Difference between revisions of "DistOS 2014W Lecture 20"
(→Comet: Added high-level description of Comet) |
|||
| Line 9: | Line 9: | ||
[https://www.usenix.org/conference/osdi10/comet-active-distributed-key-value-store The presentation video of Comet] | [https://www.usenix.org/conference/osdi10/comet-active-distributed-key-value-store The presentation video of Comet] | ||
Cassandra | |||
+ | |||
Cassandra is essentially running a BigTable interface on top of a Dynamo infrastructure. BigTable uses GFS' built-in replication and Chubby for locking. Cassandra uses gossip algorithms: [http://dl.acm.org/citation.cfm?id=1529983 Scuttlebutt]. Apache Zookeeper is used for distributed configuration. | |||
− | |||
Google developed its technology interbally and used for competitive advantage. | |||
+ | |||
== Comet == | |||
− | |||
Facebook developed its technology in open source manner. | |||
+ | |||
− | |||
Gpl 3 you have to provide code with binary | |||
+ | |||
[https://www.usenix.org/conference/osdi10/comet-active-distributed-key-value-store The presentation video of Comet] | |||
− | |||
In AGPL addtional service also be given with source code. | |||
+ | |||
− | |||
+ | |||
− | |||
Bigtable needs gfs.cassandra depends on server's file system.Anil feels cassndra cluster is easy to setup. | |||
+ | |||
− | |||
+ | |||
− | |||
Bigtable is designed for batch updates.cassandra is for hqbdling realtime stuff. | |||
+ | |||
− | |||
+ | |||
− | |||
Schema design is explained in inbox example.it does does not give clarity about how table will look like.Anil thinks they store lot data with messages which makes table crappy. | |||
+ | |||
− | |||
+ | |||
− | |||
Cassandra is design for high speed access and online operation. | |||
+ | |||
− | |||
+ | |||
− | |||
Zookeeper is similar to chhuby | |||
+ | |||
− | |||
Zookeeper is for node level information | |||
+ | |||
− | |||
Gossip is more about key partitioning | |||
+ | |||
− | |||
+ | |||
− | |||
Zookeeper is for configuration of new node. | |||
+ | |||
− | |||
+ | |||
− | |||
It writes in immutable way like functional programming.there is no assignment in functional programming. | |||
Revision as of 11:24, 25 March 2014
Cassandra
Cassandra is essentially running a BigTable interface on top of a Dynamo infrastructure. BigTable uses GFS' built-in replication and Chubby for locking. Cassandra uses gossip algorithms: Scuttlebutt. Apache Zookeeper is used for distributed configuration.
Comet
The major idea behind Comet is triggers/callbacks. There is an extensive literature in extensible operating systems, basically adding code to the operating system to better suit my application.
The presentation video of Comet
Cassandra + Cassandra is essentially running a BigTable interface on top of a Dynamo infrastructure. BigTable uses GFS' built-in replication and Chubby for locking. Cassandra uses gossip algorithms: Scuttlebutt. Apache Zookeeper is used for distributed configuration.
− Google developed its technology interbally and used for competitive advantage. +
Comet
− Facebook developed its technology in open source manner. +
− Gpl 3 you have to provide code with binary + The presentation video of Comet − In AGPL addtional service also be given with source code. + −
+ − Bigtable needs gfs.cassandra depends on server's file system.Anil feels cassndra cluster is easy to setup. + −
+ − Bigtable is designed for batch updates.cassandra is for hqbdling realtime stuff. + −
+ − Schema design is explained in inbox example.it does does not give clarity about how table will look like.Anil thinks they store lot data with messages which makes table crappy. + −
+ − Cassandra is design for high speed access and online operation. + −
+ − Zookeeper is similar to chhuby + − Zookeeper is for node level information + − Gossip is more about key partitioning + −
+ − Zookeeper is for configuration of new node. + −
+ − It writes in immutable way like functional programming.there is no assignment in functional programming.