Comments on: Cassandra Internals – Tricks!

By: Shekhar

Shekhar — Mon, 13 Jun 2011 08:44:00 +0000

Hi Mike,

I’d like to understand your statement: “Cassandra uses a technique known as hinted handoff, where the data is written to anther random node X to be stored and replayed for node Y when it comes back online (remember that gossip will quickly tell X when Y comes online).”
Do you think this applies when consistency level chosen for the write operation is Quorum/Local_Quorum/Each_quorum? Or this is applicable only when consistency level chosen is ‘ANY’ for writes?

thanks,
shekhar

By: links for 2010-11-27 « Dan Creswell’s Linkblog

links for 2010-11-27 « Dan Creswell’s Linkblog — Sat, 27 Nov 2010 12:14:56 +0000

[...] Cassandra Internals – Tricks! (tags: cassandra internals) [...]

By: Mike Perham

Mike Perham — Thu, 08 Jul 2010 14:28:55 +0000

I believe it will write a hint to C and return success. The Cassandra wiki on Hinted Handoff should have more details.

By: Shen

Shen — Thu, 08 Jul 2010 05:58:05 +0000

Hi Mike,
f I have A,B,C and D nodes(RF=1), and write ConsistencyLevel=ANY, so A coordinator node sends a write request to another node(e.g. B node), but B node is down during write operation, what happend? return failure message to client immediately? or write a hint to another node(e.g. C node) and return success message to client? or could anyone can give me a real case?

By: Cassandra内部机制 – 技巧 « a db thinker's home

Cassandra内部机制 – 技巧 « a db thinker's home — Sun, 30 May 2010 14:23:01 +0000

[...] – 技巧 Cassandra内部运作 – 技巧 By Mike Perham Translated By [...]

By: Brian S.

Brian S. — Mon, 22 Mar 2010 01:31:40 +0000

Hey Mike,
I’ve thoroughly enjoyed your series of posts on Cassandra’s internals. Thanks!