Cy Quotes

We've searched our database for all the quotes and captions related to Cy. Here they are! All 100 of them:

Lu-cy...you have some s'plainin' to do. ~Gem
Larissa Ione (Passion Unleashed (Demonica, #3))
Hearts can never be stolen, Cy. They can only be given.” – Ren
Sherrilyn Kenyon (Retribution (Dark-Hunter, #19))
Don't be an Island Cy. When you push us away, the only person you hurt is yourself.
Victoria Lynn (London in the Dark (Light of London #1))
Why are you still with me, Fry?" CyFi asks after one of his body-shaking seizures. "Any sane dude woulda taken off days ago. "Who says I'm sane?" "Oh, you're sane, Fry. You're so sane, you scare me. You're so sane, it's insane.
Neal Shusterman (Unwind (Unwind, #1))
a salesman is an it that stinks to please but whether to please itself or someone else makes no more difference than if it sells hate condoms education snakeoil vac uumcleaners terror strawberries democ ra(caveat emptor)cy superfluous hair
E.E. Cummings
choose your words wisely, because they will influence your happiness, your relationships, and your personal wealth.
Andrew B. Newberg (Words Can Change Your Brain: 12 Conversation Strategies to Build Trust, Resolve Conflict, and Increase Intima cy)
Any form of negative rumination—for example, worrying about your financial future or health—will stimulate the release of destructive neurochemicals.
Andrew B. Newberg (Words Can Change Your Brain: 12 Conversation Strategies to Build Trust, Resolve Conflict, and Increase Intima cy)
I love my sculptures, and I was lucky I had them for 50 years because no one would look at them and I really liked having them around.
Cy Twombly
These conversational shortcomings are not caused by poor education.
Andrew B. Newberg (Words Can Change Your Brain: 12 Conversation Strategies to Build Trust, Resolve Conflict, and Increase Intima cy)
Daddy didn’t say anything for a minute or so, and then he reached up and caught a firefly as it glowed beside him. “See this light?” he asked me when the firefly lit up his hand. “Yes’r.” “That light is bright enough to light up a little speck of the night sky so a man can see it a ways away. That’s what God expects us to do. We’re to be lights in the dark, cold days that are this world. Like fireflies in December.” “Time meandered on without Gemma’s momma and daddy, and it meandered on without Cy fuller and Walt Blevins. . . but those of us left behind viewed life more dearly, felt it more keenly. I’d learned a bit more about God and I’d seen His powerful hands at work. As I was growing, my heart was changing. And the way I figured it, there were lessons learned in those dark days that would help me for years to come.” “As I sat on the porch on that December day . . . I leaned my head against the rail and sighed deeply. The way I figured it just then, my summer may have been full of bad luck, but my life wasn’t. I figured as far as family went, I was one of the luckiest girls alive.
Jennifer Erin Valent (Fireflies in December (Calloway Summers #1))
When we limit ourselves to speaking for only thirty seconds, the brain quickly adapts by filtering out irrelevant information. There’s another advantage to speaking briefly: it limits our ability to express negative emotions.
Andrew B. Newberg (Words Can Change Your Brain: 12 Conversation Strategies to Build Trust, Resolve Conflict, and Increase Intima cy)
There were times when initial introductions were so vested with something other as to confuse and distract and entrance both parties, Cy would realize later. And only further into their relationships when you knew the person better, and their place in your life became clear, if there was love, if there was hate, if there was deepness of any kind, only then did you understand that the embers of meaning have been present all along and glowing since that first moment you laid eyes on them. As if you already knew them before you came to know them. As if some rift had bent time.
Sarah Hall (The Electric Michelangelo)
All the computers in the world are on a network. They’re linked by our cuffs. But I’m a computer. Jack’s a computer—Akilah—PA Young—all the cy-clones. We’re all computers. You know the great thing about computers? They can be hacked.
Beth Revis (The Body Electric)
Before you speak, ask yourself this question: will your words improve the silence?
Andrew B. Newberg (Words Can Change Your Brain: 12 Conversation Strategies to Build Trust, Resolve Conflict, and Increase Intima cy)
Elliot Rawley was a drinker, Cy’s mother had been right. And he was a poor drinker. One that let the demons of the bottle into his head when he tipped it back, demons that went about unloosing all the trouble they could find stashed in the catacombs of his mind. Every tragic thing that had ever happened, every self-doubt, every delusion, freed itself from bondage and revisited him when he drank.
Sarah Hall (The Electric Michelangelo)
It’s Curt Schilling and his bloody sock staring down the Yankees in the Bronx. It’s Derek Lowe taking the mound the very next night to complete the most improbable comeback in baseball history—and then seven days later clinching the World Series. It’s Pedro Martinez and his six hitless innings of postseason relief against the Indians. Yes, it is also Cy Young and Roger Clemens, and the 192 wins in a Red Sox uniform that they share—the perfect game for Young, the 20 strikeout games for Clemens—but it is also Bill Dinneen clinching the 1903 World Series with a busted, bloody hand, and Jose Santiago shutting down Minnesota with two games left in the season to keep the 1967 Impossible Dream alive, and Jim Lonborg clinching the Impossible Dream the very next day, and Jim Lonborg again, tossing a one-hitter and a three-hitter in the 1967 World Series, and Luis Tiant in the 1975 postseason, shutting out Oakland and Cincinnati in back-to-back starts. They are all winners.
Tucker Elliot (Boston Red Sox: An Interactive Guide to the World of Sports)
Nobody has won thirty games in a season since Denny McLain did it in 1968. No other pitcher has drunk as many Pepsi-Colas, broken as many team rules, or played the organ as famously as McLain did. And there has never been another World Series game in which both starting pitchers had won the Cy Young and Most Valuable Player awards that year.
Bob Gibson (Pitch by Pitch: My View of One Unforgettable Game)
The best is yet to come...
Cy Coleman (Cy Coleman Songbook)
And we who have always thought of happiness climbing, would feel the emotion that almost startles when happiness falls.
Cy Twombly
We over-manage and under-lead, trying to control people rather than connecting to them and developing their potential.
Cy Wakeman (Reality-Based Leadership: Ditch the Drama, Restore Sanity to the Workplace, and Turn Excuses into Results)
Stick with me," CyFi had said, putting his fist in the air, "and as God is my witness, you will never go hungry again." Then he added, "That's from Gone with the Wind.
Neal Shusterman (Unwind (Unwind, #1))
I probably won more games than you'll ever see - Cy Young
Reed Browning (Cy Young: A Baseball Life)
Leaning over, Jace cupped his cheek again and rested his forehead against his. “The sky’s missing a star tonight, Cy, because you’re right here with me.
A.L. Morrow (Watcher (Star-Crossed Celestials Duet #1))
I lurve her. She’s got such beautiful fuck off energy. It’s like big dick energy…but spi-cy!
Reese Rivers (Dance Butterfly Dance (Masked Duet, #1))
I go by CyFi.
Neal Shusterman (Unwind (Unwind, #1))
Lev had agreed to go with him because he knew the two tilled a need in each other. CyFi was like a preacher with no flock. He couldn't exist without an audience, and Lev needed someone who could fill his head with ideas, to replace the lifetime of ideas that had been taken from him.
Neal Shusterman (Unwind (Unwind, #1))
Relief pitchers have only recently begun receiving proper recognition. When Whitey Ford rose at the New York Baseball Writers banquet to receive the Cy Young Award for the 1961 season, he said he had a nine-minute speech but would deliver only seven minutes of it. He would let Luis Arroyo, who had saved so many of Ford’s wins, do the final two minutes.
George F. Will (Men at Work: The Craft of Baseball)
Love Knows NO GENDER.
Cy_squared
I’d tarred him with the same brush my ancestors had been tarred with. I’d become the perpetrator of the crime with my prejudice of his looks.
C.Y. Croc (Matched to Wrath (Monster Match #2))
Shut up and kiss me! You had me at, I know every millimetre of your face.
C.Y. Croc (Matched to Wrath (Monster Match #2))
I hate roses. Don't you? It's all right if you can hide them in a cutting garden, but I think a rose garden is the height of ick.
Cy Twombly
Like most bad ideas, it started with alcohol.
Cy Wyss (Polygraph)
The past is a springboard for me….Ancient things are new things. Everything lives in the moment; that’s the only time it can live, but its influence can go on forever.
Cy Twombly
In fact, employee evaluations, if you keep them at all, should be centered not on past performance but on readiness for the future.
Cy Wakeman (No Ego: How Leaders Can Cut the Cost of Workplace Drama, End Entitlement, and Drive Big Results (How Leaders Can Cut the Cost of Drama in the Workplace, End Entitlement, and Drive Big Results))
Legs still clenched together like a twelve year old virgin at a pedophilia conference
Cy Harley Cromwell (Feast of Infants: Act : 1)
You're like a salmon swimming upstream," Lev offers. “It's inside you to do it. And it's inside me to help you get there.” “Salmon.” Cy looks thoughtful. “I once saw this poster about a salmon. It was jumping up this waterfall, see? But there was a bear at the top, and the fish, it was jumping right into the bear's mouth. The caption beneath— it was supposed to be funny—said, The journey of a thousand miles sometimes ends very, very badly.
Neal Shusterman (Unwind (Unwind, #1))
We cannot guess what incident or influence arranged our lives or ambitions in the way that it did, or whether in fact it was something deeper. And most mysterious of all is why artists become artists, and why they become the artists they are.
Joshua Rivkin (Chalk: The Art and Erasure of Cy Twombly)
Takie dzia­ła­nia to także go­to­wy prze­pis na ka­ta­stro­fę. Nawet naj­po­pu­lar­niej­si twór­cy, któ­rych mamy za wiecz­nie za­do­wo­lo­nych i na­ła­do­wa­nych dobrą ener­gią, łapią so­cial­me­dio­we kry­zy­sy, gdy któ­re­goś dnia nie są w sta­nie wsta­wić żad­ne­go po­zy­tyw­ne­go zdję­cia ani na­grać ekscytujące­go sto­ries. Na tym polu łatwo się wy­pa­lić, znu­dzić swoją dzia­łal­no­ścią i na­brać niebezpiecznego prze­ko­na­nia, że nie mamy prawa do sła­bo­ści oraz gor­szych dni.
Klaudyna Maciąg (Pisz. Publikuj. Działaj. Jak tworzyć skuteczne treści w internecie)
Rather they are largely related to an underdeveloped brain, for the areas that govern social awareness, empathy, and related language skills are not fully operational until we’re about thirty years old. Despite this neurological handicap, scientific research shows that anyone—young or old—can exercise the language and social-awareness centers of the brain in ways that will enhance their capacity to communicate more effectively with others.
Andrew B. Newberg (Words Can Change Your Brain: 12 Conversation Strategies to Build Trust, Resolve Conflict, and Increase Intima cy)
See my coat over there? I want you to look in the pockets.” CyFi’s heavy coat is a few yards away tossed over the seat of a swing. Lev goes to the swing set and picks up the coat. He reaches into an inside pocket and finds, of all things, a gold cigarette lighter. He pulls it out. “Is that it, Cy? You want a cigarette?” If a cigarette would bring CyFi out of this, Lev would be the first to light it for him. There are things far more illegal than cigarettes, anyway. “Check the other pockets.” Lev searches the other pockets for a pack of cigarettes, but there are none. Instead he finds a small treasure trove. Jeweled earrings, watches, a gold necklace, a diamond bracelet—things that shimmer and shine even in the dim daylight. “Cy, what did you do . . . ?” “I already told you, it wasn’t me! Now go take all that stuff and get rid of it. Get rid of it and don’t let me see where you put it.” Then he covers his eyes like it’s a game of hide-and-seek. “Go—before he changes my mind!” Lev pulls everything out of the pocket and, cradling it in his arms, runs to the far end of the playground. He digs in the cold sand and drops it all in, kicking sand back over it. When he’s done, he smoothes it over with the side of his shoe and drops a scattering of leaves above it. He goes back to CyFi, who’s sitting there just like Lev left him, hands over his face. “It’s done,” Lev says. “You can look now.” When Cy takes his hands away, there’s blood all over his face from the cuts on his hands. Cy stares at his hands, then looks at Lev helplessly, like . . . well, like a kid who just got hurt in a playground. Lev half expects him to cry. “You wait here,” Lev says. “I’ll go get some bandages.” He knows he’ll have to steal them. He wonders what Pastor Dan would say about all the things he’s been stealing lately. “Thank you, Fry,” Cy says. “You did good, and I ain’t gonna forget it.” The Old Umber lilt is back in his voice. The twitching has stopped.
Neal Shusterman (Unwind (Unwind, #1))
It’s important to remember that most television is not just entertainment: it’s also narrative. And it’s so true it’s trite that human beings are narrative animals: every culture countenances itself as culture via a story, whether mythopoeic or politico-economic; every whole person understands his lifetime as an organized, recountable series of events and changes with at least a beginning and middle. We need narrative like we need space-time; it’s a built-in thing. In the C.Y. writers today, the narrative patterns to which literate Americans are most regularly exposed are televised. And, even on a charitable account, television is a pretty low type of narrative art. It’s a narrative art that strives not to change or enlighten or broaden or reorient — not necessarily even to “entertain”—but merely and always to engage, to appeal to. Its one end — openly acknowledged — is to ensure continued watching. And (I claim) the metastatic efficiency with which it’s done so has, as cost, inevitable and dire consequences for the level of people’s tastes in narrative art. For the very expectations of readers in virtue of which narrative art is art." - from"Fictional Futures and the Conspicuously Young
David Foster Wallace (Both Flesh and Not: Essays)
There is no fault that can’t be corrected [in natural wine] with one powder or another; no feature that can’t be engineered from a bottle, box, or bag. Wine too tannic? Fine it with Ovo-Pure (powdered egg whites), isinglass (granulate from fish bladders), gelatin (often derived from cow bones and pigskins), or if it’s a white, strip out pesky proteins that cause haziness with Puri-Bent (bentonite clay, the ingredient in kitty litter). Not tannic enough? Replace $1,000 barrels with a bag of oak chips (small wood nuggets toasted for flavor), “tank planks” (long oak staves), oak dust (what it sounds like), or a few drops of liquid oak tannin (pick between “mocha” and “vanilla”). Or simulate the texture of barrel-aged wines with powdered tannin, then double what you charge. (““Typically, the $8 to $12 bottle can be brought up to $15 to $20 per bottle because it gives you more of a barrel quality. . . . You’re dressing it up,” a sales rep explained.) Wine too thin? Build fullness in the mouth with gum arabic (an ingredient also found in frosting and watercolor paint). Too frothy? Add a few drops of antifoaming agent (food-grade silicone oil). Cut acidity with potassium carbonate (a white salt) or calcium carbonate (chalk). Crank it up again with a bag of tartaric acid (aka cream of tartar). Increase alcohol by mixing the pressed grape must with sugary grape concentrate, or just add sugar. Decrease alcohol with ConeTech’s spinning cone, or Vinovation’s reverse-osmosis machine, or water. Fake an aged Bordeaux with Lesaffre’s yeast and yeast derivative. Boost “fresh butter” and “honey” aromas by ordering the CY3079 designer yeast from a catalog, or go for “cherry-cola” with the Rhône 2226. Or just ask the “Yeast Whisperer,” a man with thick sideburns at the Lallemand stand, for the best yeast to meet your “stylistic goals.” (For a Sauvignon Blanc with citrus aromas, use the Uvaferm SVG. For pear and melon, do Lalvin Ba11. For passion fruit, add Vitilevure Elixir.) Kill off microbes with Velcorin (just be careful, because it’s toxic). And preserve the whole thing with sulfur dioxide. When it’s all over, if you still don’t like the wine, just add a few drops of Mega Purple—thick grape-juice concentrate that’s been called a “magical potion.” It can plump up a wine, make it sweeter on the finish, add richer color, cover up greenness, mask the horsey stink of Brett, and make fruit flavors pop. No one will admit to using it, but it ends up in an estimated 25 million bottles of red each year. “Virtually everyone is using it,” the president of a Monterey County winery confided to Wines and Vines magazine. “In just about every wine up to $20 a bottle anyway, but maybe not as much over that.
Bianca Bosker (Cork Dork: A Wine-Fueled Adventure Among the Obsessive Sommeliers, Big Bottle Hunters, and Rogue Scientists Who Taught Me to Live for Taste)
A month in and it seemed to CY that he was an explorer summiting the foothill of an a bizarre and primitive island.
Sarah Hall (The Electric Michelangelo)
The great Cy-computer burned out in an orgy of agony as the varth elixir bubbled into froth.
Vaughn Heppner (The Lost Star Gate (Lost Starship, #9))
I probably won more games than you'll ever see. - Cy Young
Reed Browning (Cy Young: A Baseball Life)
Flash grenades—a weapon used in China. Ingrid shivered as Cy’s comments suddenly made sense. Chinatown was so close. She was so close to the Chinese, to Lee and Jiao. So close, and so oblivious.
Beth Cato (Breath of Earth (Blood of Earth, #1))
Tex’ forearm twitched before he snarled again; “Lay…the…fuck…off.” Each word dripped with venom. “We will but first I want to make sure you take my meaning – take it as gospel. Play your little game, fuck her bow-legged but when it comes down to a choice between you or her getting hurt, I’ll put a bullet in her pretty little head so fast you’ll think you imagined her.” With that, he walked off. Cy following behind. They tipped their hats to Elena as they passed her.
Keshia Harris (Tex (Lord & Master, #2))
The problem and pleasure of writing about any artist is that the life and the art always overlap, are always in conversation. No neat divide. No way to write about one without the other. Life and art are never separate conversations. It’s easy to read—and overread—the biographical in Twombly’s art. He practically dares you.
Joshua Rivkin (Chalk: The Art and Erasure of Cy Twombly)
And yet, to describe Twombly’s abstract paintings, or to look at reproductions, tiny postage stamps a poor proxy for his floor-to-ceiling canvases, is to miss why they capture the imagination. “A Twombly looks,” writes one critic, “the way thinking sometimes feels.”8 And that is Twombly’s gift, the bewildering slipstream between thinking and feeling—a gift I’ve spent years trying to understand.
Joshua Rivkin (Chalk: The Art and Erasure of Cy Twombly)
Gratitude fused with generosity expands the blessing. A practice of gratitude that fuels generosity can change other people’s lives in an impactful way. Breathe in gratitude, breathe out generosity. Repeat. A vital, virtuous cycle.
Cy Wakeman (Life's Messy, Live Happy: Things Don't Have to Be Perfect for You to Be Content)
Is it my imagination or is his scrunched-up face, demonic eyes and fangs suddenly my idea of handsome?
C.Y. Croc (Matched to Xycho (Monster Match #1))
But the young man in his twenties is still in peak dreaming season: a thrilling time, an insecure time, even at the best of times. It should be a season full of possibility. Economic, romantic, technological, political, existential possibility. Yes, among all the various relativities to be considered, age is one that can't be parsed. The style of Cy - the style of all young people - now radically interrupted.
Zadie Smith (Intimations)
This was why people picked one person forever and ever amen—because that one person mattered more than anyone else. There was no democracy in monogamy, and Cy got that now like he never had before.
Amy Lane (Tart and Sweet (Candy Man, #4))
{ "myRectShape": { "prefix": "myRectShape", "body": [ "float ${NAME}(float cx, float cy, float sx, float sy){", "\tfloat myRectX = step(cx - sx / 2.0, vUV.s) - step(cx + sx / 2.0, vUV.s);", "\tfloat myRectY = step(cy - sy / 2.0, vUV.t) - step(cy + sy / 2.0, vUV.t);", "\treturn myRectX * myRectY;", “}” ], “description”: “Draw a rectangle from its center position cx and cy, and size sx and sy” }, }
Davide Santini (TouchDesigner Introduction to GLSL (Learn TouchDesigner))
Jeśli ro­zu­mie się ludzi, wszy­scy stają się in­te­re­su­ją­cy.
Therese Bohman (Andromeda)
De hel is van binnen gestoffeerd als een Indisch hotel... en je krijgt er hetzelfde te eten ook...
Henri van Wermeskerken (Tropenadel: Van Vliet, Sweet & Cy)
I’ll love you, Jace. I’ll love you until my end of days.” Warmth flooded Jace’s chest. His smile broadened, and he twisted in the Messenger’s arms to look up at him. Burying a hand in his hair, he pulled Cyrus down for a kiss. “You can’t just say shit like that to me, Cy,” he told him.” You’re going to make me love you, too.
A.L. Morrow (Messenger (Star-Crossed Celestials Duet #2))
My daughter was making, that day in Chicago, an entirely unconscious but quite basic assumption about people and the work they do. She was assuming that the glory she saw in the work reflected a glory in its maker, that the painting was the painter as the poem is the poet, that every choice one made alone—every word chosen or rejected, every brush stroke laid or not laid down—betrayed one’s character. Style is character.
Joshua Rivkin (Chalk: The Art and Erasure of Cy Twombly)
I’m held by nothing, I hold on to nothing, I belong to nothing. / All sensations seize me, and none endure.
Joshua Rivkin (Chalk: The Art and Erasure of Cy Twombly)
the hero’s art is not about imagination, we see here, but perseverance in the face of endless tedium.
Joshua Rivkin (Chalk: The Art and Erasure of Cy Twombly)
as if each painting is an hour of the day,
Joshua Rivkin (Chalk: The Art and Erasure of Cy Twombly)
At first he looked out of touch, then he looked inevitable, and then he looked great.
Joshua Rivkin (Chalk: The Art and Erasure of Cy Twombly)
His passions and enthusiasms extended to paintings of all kinds, as well as to history, mythology, music, and much else, and he did not care if others did not share them. He was learned in a non-scholarly way. For him, culture was a living thing, not a box full of treasures to be plundered.
Joshua Rivkin (Chalk: The Art and Erasure of Cy Twombly)
But Yau overstates the case. Culture for Twombly was both a “living thing” and “a box of treasures to be plundered.” These are not mutually exclusive, especially for Twombly.
Joshua Rivkin (Chalk: The Art and Erasure of Cy Twombly)
I do not think of all the misery, but of the glory that remains. Go outside into the fields, nature and the sun, go out and seek happiness in yourself and in God. Think of the beauty that again and again discharges itself within and without you and be happy. “Very nice,” Cy says. “Was that Whitman? Longfellow?” “Anne Frank,” Ashley says.
A.M. Homes (May We Be Forgiven)
Red, brown, yellow, green, black. Five colours to say everything that could be said. And what Cy suddenly wanted, more than anything in the world just then, what he wanted was that missing blue, primary and resistant to the trade. Blue that was unstable and misbehaved when left in skin. Blue like the sea that had taken his father. Blue, for his mother's sake, and for the true colour of every bereaved and bloodless heart when it is collapsing.
Sarah Hall (The Electric Michelangelo)
In Cassandra, however, sorting is by design because you must determine how to compare data for a column family at the time of its creation. The comparator of the column family dictates how the rows are ordered on reads. Additionally, columns are ordered by their column names, also by a comparator.
C.Y. Kan (Cassandra Data Modeling and Analysis)
Since the write operation is log-based and memory-based, it does not involve any read operation, and therefore the write operation can be extremely fast.
C.Y. Kan (Cassandra Data Modeling and Analysis)
The commitlog is purged after the flush.
C.Y. Kan (Cassandra Data Modeling and Analysis)
It also checks all the remaining replicas in the background. If a replica is found to be inconsistent, the coordinator will issue an update to bring back the consistency. This mechanism is called read repair.
C.Y. Kan (Cassandra Data Modeling and Analysis)
A query is always the starting point of designing a Cassandra data model. As an analogy, a query is a question and the data model is the answer.
C.Y. Kan (Cassandra Data Modeling and Analysis)
The node location can be determined by the rack and data center with reference to the node's IP address.
C.Y. Kan (Cassandra Data Modeling and Analysis)
Bloom filter Bloom filter is a sample subset of the primary index with very fast nondeterministic algorithms to check whether an element is a member of a set. It is used to boost the performance.
C.Y. Kan (Cassandra Data Modeling and Analysis)
When a read request comes in to a node, the data to be returned is merged from all the related SSTables and any unflushed memtables. Timestamps are used to determine which one is up-to-date. The merged value is also stored in a write-through row cache to improve the future read performance.
C.Y. Kan (Cassandra Data Modeling and Analysis)
implies that there can be short intervals of inconsistency among the replicated nodes during which the data gets updated among these nodes. In other words, the replicas are updated asynchronously.
C.Y. Kan (Cassandra Data Modeling and Analysis)
A snitch determines which data centers and racks to go for in order to make Cassandra aware of the network topology for routing the requests efficiently.
C.Y. Kan (Cassandra Data Modeling and Analysis)
On the flip side, the following figure shows the components and their sequence of executions that form a read path: Cassandra read path
C.Y. Kan (Cassandra Data Modeling and Analysis)
Conversely, Cassandra is designed to work in a massive-scale, distributed environment in which ACID compliance is difficult to achieve, and replication is a must.
C.Y. Kan (Cassandra Data Modeling and Analysis)
The Map data structure gives efficient key lookup, and the sorted nature provides efficient scans. RowKey is a unique key and can hold a value. The inner SortedMap data structure allows a variable number of ColumnKey values. This is the trick that Cassandra uses to be schemaless and to allow the data model to evolve organically over time. It should be noted that each column has a client-supplied timestamp associated, but it can be ignored during data modeling. Cassandra uses the timestamp internally to resolve transaction conflicts.
C.Y. Kan (Cassandra Data Modeling and Analysis)
If no time zone is specified, the time zone of the Cassandra coordinator node handing the write request is used. Therefore the best practice is to specify the time zone with the timestamp rather than relying on the time zone configured on the Cassandra nodes to avoid any ambiguities.
C.Y. Kan (Cassandra Data Modeling and Analysis)
If a failure happens, the commitlog can be used to replay the sequence of the write operations to merge the data that persists in the SSTables.
C.Y. Kan (Cassandra Data Modeling and Analysis)
Read operation is also very efficient by looking up the data in the memory store and the indexed SSTables, which are then merged to return the data.
C.Y. Kan (Cassandra Data Modeling and Analysis)
Given a sufficiently long period of time without further changes, all the updates can be expected to propagate throughout the cluster and the replicas on all the nodes will be consistent eventually. In real life, an update takes only a fraction of a second to become eventually consistent. In other words, it is a trade-off between consistency and latency.
C.Y. Kan (Cassandra Data Modeling and Analysis)
The replication factor per data center is set to three here. With two data centers, there are six replicas in total.
C.Y. Kan (Cassandra Data Modeling and Analysis)
Cassandra uses a very efficient algorithm, called Phi Accrual Failure Detection Algorithm, to detect the failure of a node. The idea of the algorithm is that the failure detection is not represented by a Boolean value stating whether a node is up or down. Instead, the algorithm outputs a value on the continuous suspicion level between dead and alive, on how confident it is that the node has failed.
C.Y. Kan (Cassandra Data Modeling and Analysis)
Hinted handoff aims at reducing the time to restore a failed node when rejoining the cluster. It ensures absolute write availability by sacrificing a bit of read consistency. If a replica is down at the time a write occurs, another healthy replica stores a hint. Even worse, if all the relevant replicas are down, the coordinator stores the hint locally. The hint basically contains the location of the failed replica, the affected row key, and the actual data that is being written. When a node responsible for the token range is up again, the hint will be handed off to resume the write. As such, the update cannot be read before a complete handoff, leading to inconsistent reads.
C.Y. Kan (Cassandra Data Modeling and Analysis)
Wide row It is common to use wide rows for ordering, grouping and efficient filtering. Besides, you can use skinny rows. All you have to consider is the number of columns the row contains. It is worth noting that for a column family storing skinny rows, the column key is repeatedly stored in each column. Although it wastes some storage space, it is not a problem on inexpensive commodity hard disks.
C.Y. Kan (Cassandra Data Modeling and Analysis)
Because one row can hold as many as 2 billion variable columns.
C.Y. Kan (Cassandra Data Modeling and Analysis)
Cassandra borrows the commitlog mechanism from Google BigTable to ensure data durability.
C.Y. Kan (Cassandra Data Modeling and Analysis)
The data that is being updated is then written to a memory structure, known as memtable.
C.Y. Kan (Cassandra Data Modeling and Analysis)
The ability to scale horizontally and incrementally is a Cassandra key design feature.
C.Y. Kan (Cassandra Data Modeling and Analysis)
For write operations, Cassandra supports tunable consistency by various write consistency levels. The write consistency level is the number of replicas that acknowledge a successful write. It is tunable on a spectrum of write consistency levels, as shown in the following figure: Cassandra write consistency levels
C.Y. Kan (Cassandra Data Modeling and Analysis)
Another repair mechanism is called anti-entropy which is a replica synchronization mechanism to ensure up-to-date data on all nodes and is run by the administrators manually.
C.Y. Kan (Cassandra Data Modeling and Analysis)
Features of Cassandra In order to keep this chapter short, the following bullet list covers the great features provided by Cassandra: Written in Java and hence providing native Java support Blend of Google BigTable and Amazon Dynamo Flexible schemaless column-family data model Support for structured and unstructured data Decentralized, distributed peer-to-peer architecture Multi-data center and rack-aware data replication Location transparent Cloud enabled Fault-tolerant with no single point of failure An automatic and transparent failover Elastic, massively, and linearly scalable Online node addition or removal High Performance Built-in data compression Built-in caching layer Write-optimized Tunable consistency providing choices from very strong consistency to different levels of eventual consistency Provision of Cassandra Query Language (CQL), a SQL-like language imitating INSERT, UPDATE, DELETE, SELECT syntax of SQL Open source and community-driven
C.Y. Kan (Cassandra Data Modeling and Analysis)
No sequence In a relational database, sequences are usually used to generate unique values for a surrogate key. Cassandra has no sequences because it is extremely difficult to implement in a peer-to-peer distributed system. There are however workarounds, which are as follows: Using part of the data to generate a unique key Using a UUID In most cases, the best practice is to select the second workaround.
C.Y. Kan (Cassandra Data Modeling and Analysis)
The most important difference is that a relational database models data by relationships whereas Cassandra models data by query.
C.Y. Kan (Cassandra Data Modeling and Analysis)
In a distributed system backed by Cassandra, we should minimize unnecessary network traffic as much as possible. In other words, the lesser the number of nodes the query needs to work with, the better the performance of the data model. We must cater to the cluster topology as well as the physical storage of the data model.
C.Y. Kan (Cassandra Data Modeling and Analysis)
Cassandra is now 5 years old. It is an active open source project in the Apache Software Foundation and therefore it is known as Apache Cassandra as well. Cassandra can manage huge volume of structured, semi-structured, and unstructured data in a large distributed cluster across multiple data centers. It provides linear scalability, high performance, fault tolerance, and supports a very flexible data model.
C.Y. Kan (Cassandra Data Modeling and Analysis)
When the memtable is full, the data inside the memtable is flushed to a disk storage structure, SSTable.
C.Y. Kan (Cassandra Data Modeling and Analysis)
The writes are automatically partitioned by the row key and replicated to the other nodes holding the same partition.
C.Y. Kan (Cassandra Data Modeling and Analysis)