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https://issues.apache.org/jira/browse/CASSANDRA-1199?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arya Goudarzi updated CASSANDRA-1199:
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Attachment: multiget_slice.php
You can change $hosts in this script to include a cluster of nodes or a single
machine as you like to. Note that replication factor is the same as number of
hosts. For me the max hosts I have in my cluster are 3 so using consistency
levels 1 is ok, but you might want to change that if you're adding more than 3
nodes into the list.
> multiget_slice() calls using TBinaryProtocolAccelerated always take up to the
> TSocket->recvTimeout before returning results
> ---------------------------------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-1199
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1199
> Project: Cassandra
> Issue Type: Bug
> Affects Versions: 0.7
> Environment: CentOS 5.2
> Cassandra Nightly Build June 11th
> Thrift Trunc
> Using TBinaryProtocolAccelerated only!
> Reporter: Arya Goudarzi
> Attachments: multiget_slice.php
>
>
> I am comparing the following
> - Reading of 100 SuperColumns in 1 SCF row using multiget_slice() with 1
> key and 1 column name in 100 loop iterations
> - Reading of 100 SuperColumns in 1 SCF row using multiget_slice() with 1
> key and 100 column names in a single call
> I always get a consistent result and that is the single call takes more time
> then 100 calls. After some investigation, it seamed that the time it took to
> execute multiget_slice with 100 columns is always close to the
> TSocket->recvTimeout, Increasing the recvTimeout results that call to take
> that much time before retuning. After digged into TSocket->read (TSocket.php
> line 261) and looking at some of the meta data of fread, it seams that none
> of the buffer chunks get the eof flag=1. And the stream waits till timeout
> has reached.
> This only happens if TBinaryProtocolAccelerated (thrift_protocol.so) is used.
> I have attached my code to reproduce this issue. You can set the timeouts to
> see how it affects the read call in multiget_slice.
> Please investigate and move to Thrift if not a Cassandra interface issue.
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