of non-relational data stores that break with a long history of relational databases” - Wikipedia Not a single technique Not a single type of data Not a single type of use case Thursday, April 15, 2010
but CouchDB is built of the Web. I’ve never seen software that so completely embraces the philosophies behind HTTP. CouchDB makes Django look old-school in the same way that Django makes ASP look outdated” - http://jacobian.org/writing/of-the-web/ Thursday, April 15, 2010
who knows. I’m sure of one thing, though — this is what the software of the future looks like” - http://jacobian.org/writing/of-the-web/ Thursday, April 15, 2010
ring knowledge in the cluster Key hashing technique used to distribute keys on the Container/keyspace. Determines number of replicas for its contents Thursday, April 15, 2010
bucket and ring knowledge in the cluster Key hashing technique used to distribute keys on the Container/keyspace. Determines number of replicas for its contents Covering for a failed “neighbor” node while gone Thursday, April 15, 2010
state, bucket and ring knowledge in the cluster Allows retrieval of “weakly” linked objects Key hashing technique used to distribute keys on the Container/keyspace. Determines number of replicas for its contents Covering for a failed “neighbor” node while gone Thursday, April 15, 2010
Tree Shares state, bucket and ring knowledge in the cluster Allows retrieval of “weakly” linked objects Data structure for efficient summary about keys. Gossiped. Key hashing technique used to distribute keys on the Container/keyspace. Determines number of replicas for its contents Covering for a failed “neighbor” node while gone Thursday, April 15, 2010
Tree Node Shares state, bucket and ring knowledge in the cluster Allows retrieval of “weakly” linked objects Data structure for efficient summary about keys. Gossiped. One server. Runs vnodes which claims partitions. Key hashing technique used to distribute keys on the Container/keyspace. Determines number of replicas for its contents Covering for a failed “neighbor” node while gone Thursday, April 15, 2010
Tree Node Partition Shares state, bucket and ring knowledge in the cluster Allows retrieval of “weakly” linked objects One slice (part) of the ring. Data structure for efficient summary about keys. Gossiped. One server. Runs vnodes which claims partitions. Key hashing technique used to distribute keys on the Container/keyspace. Determines number of replicas for its contents Covering for a failed “neighbor” node while gone Thursday, April 15, 2010
Tree Node Partition Read Repair Shares state, bucket and ring knowledge in the cluster Allows retrieval of “weakly” linked objects One slice (part) of the ring. Data structure for efficient summary about keys. Gossiped. One server. Runs vnodes which claims partitions. Key hashing technique used to distribute keys on the Auto correction of out-of-date objects Container/keyspace. Determines number of replicas for its contents Covering for a failed “neighbor” node while gone Thursday, April 15, 2010
Tree Node Partition Read Repair Replica Shares state, bucket and ring knowledge in the cluster Allows retrieval of “weakly” linked objects One slice (part) of the ring. Data structure for efficient summary about keys. Gossiped. Number of copies of the same object in the cluster One server. Runs vnodes which claims partitions. Key hashing technique used to distribute keys on the Auto correction of out-of-date objects Container/keyspace. Determines number of replicas for its contents Covering for a failed “neighbor” node while gone Thursday, April 15, 2010
Tree Node Partition Read Repair Replica Ring Shares state, bucket and ring knowledge in the cluster Allows retrieval of “weakly” linked objects One slice (part) of the ring. Data structure for efficient summary about keys. Gossiped. Number of copies of the same object in the cluster One server. Runs vnodes which claims partitions. Key hashing technique used to distribute keys on the The complete “space”, divided into partitions which are claimed by vnodes Auto correction of out-of-date objects Container/keyspace. Determines number of replicas for its contents Covering for a failed “neighbor” node while gone Thursday, April 15, 2010
Tree Node Partition Read Repair Replica Ring Vector Clock Shares state, bucket and ring knowledge in the cluster Allows retrieval of “weakly” linked objects One slice (part) of the ring. Data structure for efficient summary about keys. Gossiped. Number of copies of the same object in the cluster One server. Runs vnodes which claims partitions. Key hashing technique used to distribute keys on the The complete “space”, divided into partitions which are claimed by vnodes Auto correction of out-of-date objects Container/keyspace. Determines number of replicas for its contents Covering for a failed “neighbor” node while gone Version control technique used for objects. Thursday, April 15, 2010
Tree Node Partition Read Repair Replica Ring Vector Clock Vnode Shares state, bucket and ring knowledge in the cluster Allows retrieval of “weakly” linked objects Runs in a node and claims one partition in the ring One slice (part) of the ring. Data structure for efficient summary about keys. Gossiped. Number of copies of the same object in the cluster One server. Runs vnodes which claims partitions. Key hashing technique used to distribute keys on the The complete “space”, divided into partitions which are claimed by vnodes Auto correction of out-of-date objects Container/keyspace. Determines number of replicas for its contents Covering for a failed “neighbor” node while gone Version control technique used for objects. Thursday, April 15, 2010
"mozilla", "version": "1.9.1.8" }, "timestamp": 1270131033337 } Key, either you choose it or CouchDB does it for you Revision number Thursday, April 15, 2010
Writers do not block readers. Readers do not block Bi-directional, conflict resolving, replication Hence, won’t corrupt its data files Thursday, April 15, 2010
control. Writers do not block readers. Readers do not block Bi-directional, conflict resolving, replication Hence, won’t corrupt its data files Append only will cause data files to grow. Compaction to the rescue, in the background - for your pleasure. Thursday, April 15, 2010
concurrency control. Writers do not block readers. Readers do not block Bi-directional, conflict resolving, replication Hence, won’t corrupt its data files Awesome, Cool, Impressive, Dope Append only will cause data files to grow. Compaction to the rescue, in the background - for your pleasure. Thursday, April 15, 2010
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