Yes, the key distribution does vary across the nodes. For example, on the node with the highest data, Number of Keys (estimate) is 6527744 for a particular column family, whereas for the same column family on the node with least data, Number of Keys (estimate) = 3840.
Is there a way to control this distribution by setting some parameter of cassandra. I am using the Murmur3 partitioner with NetworkTopologyStrategy. Thanks, Suruchi On Thu, Sep 19, 2013 at 3:59 PM, Mohit Anchlia <mohitanch...@gmail.com>wrote: > Can you check cfstats to see number of keys per node? > > > On Thu, Sep 19, 2013 at 12:36 PM, Suruchi Deodhar < > suruchi.deod...@generalsentiment.com> wrote: > >> Thanks for your replies. I wiped out my data from the cluster and also >> cleared the commitlog before restarting it with num_tokens=256. I then >> uploaded data using sstableloader. >> >> However, I am still not able to see a uniform distribution of data across >> nodes of the clusters. >> >> The output of the bin/nodetool -h localhost status commands looks like >> follows. Some nodes have data as low as 1.12MB while some have as high as >> 912.57 MB. >> >> Datacenter: us-east >> =================== >> Status=Up/Down >> |/ State=Normal/Leaving/Joining/Moving >> -- Address Load Tokens Owns (effective) Host >> ID Rack >> UN 10.238.133.174 856.66 MB 256 8.4% >> e41d8863-ce37-4d5c-a428-bfacea432a35 1a >> UN 10.238.133.97 439.02 MB 256 7.7% >> 1bf42b5e-4aed-4b06-bdb3-65a78823b547 1a >> UN 10.151.86.146 1.05 GB 256 8.0% >> 8952645d-4a27-4670-afb2-65061c205734 1a >> UN 10.138.10.9 912.57 MB 256 8.6% >> 25ccea82-49d2-43d9-830c-b9c9cee026ec 1a >> UN 10.87.87.240 70.85 MB 256 8.6% >> ea066827-83bc-458c-83e8-bd15b7fc783c 1b >> UN 10.93.5.157 60.56 MB 256 7.6% >> 4ab9111c-39b4-4d15-9401-359d9d853c16 1b >> UN 10.92.231.170 866.73 MB 256 9.3% >> a18ce761-88a0-4407-bbd1-c867c4fecd1f 1b >> UN 10.238.137.250 533.77 MB 256 7.8% >> 84301648-afff-4f06-aa0b-4be421e0d08f 1a >> UN 10.93.91.139 478.45 KB 256 8.1% >> 682dd848-7c7f-4ddb-a960-119cf6491aa1 1b >> UN 10.138.2.20 1.12 MB 256 7.9% >> a6d4672a-0915-4c64-ba47-9f190abbf951 1a >> UN 10.93.31.44 282.65 MB 256 7.8% >> 67a6c0a6-e89f-4f3e-b996-cdded1b94faf 1b >> UN 10.236.138.169 223.66 MB 256 9.1% >> cbbf27b0-b53a-4530-bfdf-3764730b89d8 1a >> UN 10.137.7.90 11.36 MB 256 7.4% >> 17b79aa7-64fc-4e16-b96a-955b0aae9bb4 1a >> UN 10.93.77.166 837.64 MB 256 8.8% >> 9a821d1e-40e5-445d-b6b7-3cdd58bdb8cb 1b >> UN 10.120.249.140 838.59 MB 256 9.4% >> e1fb69b0-8e66-4deb-9e72-f901d7a14e8a 1b >> UN 10.90.246.128 216.75 MB 256 8.4% >> 054911ec-969d-43d9-aea1-db445706e4d2 1b >> UN 10.123.95.248 147.1 MB 256 7.2% >> a17deca1-9644-4520-9e62-ac66fc6fef60 1b >> UN 10.136.11.40 4.24 MB 256 8.5% >> 66be1173-b822-40b5-b650-cb38ae3c7a51 1a >> UN 10.87.90.42 11.56 MB 256 8.0% >> dac0c6ea-56c6-44da-a4ec-6388f39ecba1 1b >> UN 10.87.75.147 549 MB 256 8.3% >> ac060edf-dc48-44cf-a1b5-83c7a465f3c8 1b >> UN 10.151.49.88 119.86 MB 256 8.9% >> 57043573-ab1b-4e3c-8044-58376f7ce08f 1a >> UN 10.87.83.107 484.3 MB 256 8.3% >> 0019439b-9f8a-4965-91b8-7108bbb55593 1b >> UN 10.137.20.183 137.67 MB 256 8.4% >> 15951592-8ab2-473d-920a-da6e9d99507d 1a >> UN 10.238.170.159 49.17 MB 256 9.4% >> 32ce322e-4f7c-46c7-a8ce-bd73cdd54684 1a >> >> Is there something else that I should be doing differently? >> >> Thanks for your help! >> >> Suruchi >> >> >> >> On Thu, Sep 19, 2013 at 3:20 PM, Richard Low <rich...@wentnet.com> wrote: >> >>> The only thing you need to guarantee is that Cassandra doesn't start >>> with num_tokens=1 (the default in 1.2.x) or, if it does, that you wipe all >>> the data before starting it with higher num_tokens. >>> >>> >>> On 19 September 2013 19:07, Robert Coli <rc...@eventbrite.com> wrote: >>> >>>> On Thu, Sep 19, 2013 at 10:59 AM, Suruchi Deodhar < >>>> suruchi.deod...@generalsentiment.com> wrote: >>>> >>>>> Do you suggest I should try with some other installation mechanism? >>>>> Are there any known problems with the tar installation of cassandra 1.2.9 >>>>> that I should be aware of? >>>>> >>>> >>>> I was asking in the context of this JIRA : >>>> >>>> https://issues.apache.org/jira/browse/CASSANDRA-2356 >>>> >>>> Which does not seem to apply in your case! >>>> >>>> =Rob >>>> >>> >>> >> >
