I am using QUORUM CQL No SSDs (Anyway my IOPs is quite low so I dont think so it matters) No compaction is running when I receive timeout
On Fri, Mar 6, 2015 at 12:35 AM, Carlos Rolo <r...@pythian.com> wrote: > What is the consistency level you are using? > Are you using Thrift or CQL? > Are you using SSDs? > Check if compactions are running when you get the timeouts. > > Regards, > > Carlos Juzarte Rolo > Cassandra Consultant > > Pythian - Love your data > > rolo@pythian | Twitter: cjrolo | Linkedin: *linkedin.com/in/carlosjuzarterolo > <http://linkedin.com/in/carlosjuzarterolo>* > Tel: 1649 > www.pythian.com > > On Thu, Mar 5, 2015 at 9:51 PM, Jan <cne...@yahoo.com> wrote: > >> Hello Jaydeep; >> >> Run *cassandra-stress* with R/W options enabled for about the same time >> and check if you have dropped packets. >> It would eliminate the client as the source of the error & also give you >> a replicable tool to base subsequent tests/ findings. >> >> Jan/ >> >> >> >> >> On Thursday, March 5, 2015 12:19 PM, Jaydeep Chovatia < >> chovatia.jayd...@gmail.com> wrote: >> >> >> I have tried increasing timeout to 10000 but no help. Also verified that >> there is no network lost packets. >> >> Jaydeep >> >> On Wed, Mar 4, 2015 at 12:19 PM, Jan <cne...@yahoo.com> wrote: >> >> HI Jaydeep; >> >> >> - look at the i/o on all three nodes >> - Increase the write_request_timeout_in_ms: 10000 >> - check the time-outs if any on the client inserting the Writes >> - check the Network for dropped/lost packets >> >> >> hope this helps >> Jan/ >> >> >> >> On Wednesday, March 4, 2015 12:26 PM, Jaydeep Chovatia < >> chovatia.jayd...@gmail.com> wrote: >> >> >> Hi, >> >> In my test program when I increase load then I keep getting few "write >> timeout" from Cassandra say every 10~15 mins. My read:write ratio is >> 50:50. My reads are fine but only writes time out. >> >> Here is my Cassandra details: >> Version: 2.0.11 >> Ring of 3 nodes with RF=3 >> Node configuration: 24 core + 64GB RAM + 2TB >> >> "write_request_timeout_in_ms: 5000", rest of Cassandra.yaml configuration >> is default >> >> I've also checked IO on Cassandra nodes and looks very low (around 5%). >> I've also checked Cassandra log file and do not see any GC happening. Also >> CPU on Cassandra is low (around 20%). I have 20GB data on each node. >> >> My test program creates connection to all three Cassandra nodes and sends >> read+write request randomly. >> >> Any idea what should I look for? >> >> Jaydeep >> >> >> >> >> >> -- >> Jaydeep >> >> >> > > -- > > > > -- Jaydeep
