disabling hinted handoff will prevent creation of new hints, but it
will continue to attempt to deliver existing ones unless you manually
delete the hint files in the system/ dir.
On Mon, May 31, 2010 at 6:04 AM, Ran Tavory <rantav@gmail.com> wrote:
> In 0.6.2 I disabled hinted handoff, however tpstats and cfstats report seems
> odd.
> On all servers in the cluster I have:
> <HintedHandoffEnabled>false</HintedHandoffEnabled>
> tpstats reports 5 completed handoffs.
> $ nodetool -h cass25 -p 9004 tpstats
> Pool Name Active Pending Completed
> FILEUTILS-DELETE-POOL 0 0 2
> STREAM-STAGE 0 0 0
> RESPONSE-STAGE 0 0 5903099
> ROW-READ-STAGE 0 0 669093
> LB-OPERATIONS 0 0 0
> MESSAGE-DESERIALIZER-POOL 1 0 6595504
> GMFD 0 0 35947
> LB-TARGET 0 0 0
> CONSISTENCY-MANAGER 0 0 669095
> ROW-MUTATION-STAGE 0 0 644360
> MESSAGE-STREAMING-POOL 0 0 0
> LOAD-BALANCER-STAGE 0 0 0
> FLUSH-SORTER-POOL 0 0 0
> MEMTABLE-POST-FLUSHER 0 0 7
> FLUSH-WRITER-POOL 0 0 7
> AE-SERVICE-STAGE 0 0 1
> HINTED-HANDOFF-POOL 0 0 5
> In data/system/* there are only LocationInfo files, so looks like hinted
> handoff is indeed disabled and cfstats does indicate there are 0 bytes,
> however it also indicates of 32 reads which I didn't expect (cluster has
> been up for a few hours).
> $ nodetool -h cass25 -p 9004 tpstats
> ...
> Column Family: HintsColumnFamily
> SSTable count: 0
> Space used (live): 0
> Space used (total): 0
> Memtable Columns Count: 0
> Memtable Data Size: 0
> Memtable Switch Count: 0
> Read Count: 32
> Read Latency: 0.062 ms.
> Write Count: 0
> Write Latency: NaN ms.
> Pending Tasks: 0
> Key cache capacity: 1
> Key cache size: 0
> Key cache hit rate: NaN
> Row cache: disabled
> Compacted row minimum size: 0
> Compacted row maximum size: 0
> Compacted row mean size: 0
> Any idea why is this happening?
--
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support
http://riptano.com
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