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From Ran Tavory <ran...@gmail.com>
Subject Re: HintedHandoffEnabled
Date Mon, 31 May 2010 19:05:57 GMT
I deleted all files in the system dir, including hints before starting the
servers.
It's not a big deal. but can it be something else?

On Mon, May 31, 2010 at 9:53 PM, Jonathan Ellis <jbellis@gmail.com> wrote:

> 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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