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Subject: Re: Could I run node repair when disable gossip and thrift?
From: aaron morton <aaron@thelastpickle.com>
In-Reply-To: 
 <CAOA66tHxfLYQbqjnN23HW1r4Dgb1OnKUzMdcPRB6vcRVyobgRQ@mail.gmail.com>
Date: Mon, 1 Aug 2011 09:26:12 +1200
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References: 
 <CAOA66tHxfLYQbqjnN23HW1r4Dgb1OnKUzMdcPRB6vcRVyobgRQ@mail.gmail.com>
To: user@cassandra.apache.org

if you disable gossip the node will appear down to others. This would =
stop the repair starting. After repair has started it *may* still cause =
problems when new streams start (it probably does not). If the node is =
down other nodes will stop sending writes to it.=20

disable thrift will stop clients sending writes to the node.

If you disable thrift you are doing the opposite of repair. You are =
asking a node to repair it's data so it's in sync with other nodes, at =
the  same time you are preventing it from accepting writes and staying =
in sync with other nodes. So you are creating more repair work for the =
node.=20

Will will be increasing the amount of Read Repair, Hinted Handoff and =
Repair work the node must do.  IMHO it's not a good idea.=20

Cheers

-----------------
Aaron Morton
Freelance Cassandra Developer
@aaronmorton
http://www.thelastpickle.com

On 1 Aug 2011, at 06:09, Yan Chunlu wrote:

> I am running 3 nodes and RF=3D3, cassandra v0.7.4
> seems when disablegossip and disablethrift could keep node in pretty =
low load. sometimes when the node repair doing "rebuilding sstable", I =
would disable gossip and thrift to lower the load. not sure if I could =
disable them in the whole procedure. thanks!