Riak node recovery after crash.

santhosh venkat santhoshvenkat1988 at gmail.com
Fri Apr 1 02:49:30 EDT 2011


Hi ,
      I am trying to experiment with the recovery time of a riak node using
bitcask storage after a crash .

      I was able to find some information about that in this page (which is
for Innodb though)

       http://wiki.basho.com/Recovering-a-failed-node.html  which is more
about Innodb  .

     Upon Reading bitcask paper i found it uses hint file to constructs in
memory mapping , so it should not ideally take more than few mins to
reconstruct data after crash . Please throw some light on this  .

   I got this thread dump when i tried the steps outlined in the above link.

=INFO REPORT==== 1-Apr-2011::12:06:50 ===
[{alarm_handler,{set,{{disk_almost_full,"/var/lib/mysql"},[]}}}]
=INFO REPORT==== 1-Apr-2011::12:06:50 ===
[{alarm_handler,{set,{{disk_almost_full,"/var/lib/riak"},[]}}}]** Found 0
name clashes in code paths

=INFO REPORT==== 1-Apr-2011::12:06:51 ===
Spidermonkey VM (thread stack: 16MB, max heap: 8MB, pool: riak_kv_js_map)
host starting (<0.141.0>)

=INFO REPORT==== 1-Apr-2011::12:06:51 ===
Spidermonkey VM (thread stack: 16MB, max heap: 8MB, pool: riak_kv_js_map)
host starting (<0.142.0>)

=INFO REPORT==== 1-Apr-2011::12:06:51 ===
Spidermonkey VM (thread stack: 16MB, max heap: 8MB, pool: riak_kv_js_map)
host starting (<0.143.0>)

=INFO REPORT==== 1-Apr-2011::12:06:51 ===
Spidermonkey VM (thread stack: 16MB, max heap: 8MB, pool: riak_kv_js_map)
host starting (<0.144.0>)

=INFO REPORT==== 1-Apr-2011::12:06:51 ===
Spidermonkey VM (thread stack: 16MB, max heap: 8MB, pool: riak_kv_js_map)
host starting (<0.145.0>)

=INFO REPORT==== 1-Apr-2011::12:06:51 ===
Spidermonkey VM (thread stack: 16MB, max heap: 8MB, pool: riak_kv_js_map)
host starting (<0.146.0>)

=INFO REPORT==== 1-Apr-2011::12:06:51 ===
Spidermonkey VM (thread stack: 16MB, max heap: 8MB, pool: riak_kv_js_map)
host starting (<0.147.0>)

=INFO REPORT==== 1-Apr-2011::12:06:51 ===
Spidermonkey VM (thread stack: 16MB, max heap: 8MB, pool: riak_kv_js_map)
host starting (<0.148.0>)

=INFO REPORT==== 1-Apr-2011::12:06:51 ===
Spidermonkey VM (thread stack: 16MB, max heap: 8MB, pool: riak_kv_js_reduce)
host starting (<0.150.0>)

=INFO REPORT==== 1-Apr-2011::12:06:51 ===
Spidermonkey VM (thread stack: 16MB, max heap: 8MB, pool: riak_kv_js_reduce)
host starting (<0.151.0>)

=INFO REPORT==== 1-Apr-2011::12:06:51 ===
Spidermonkey VM (thread stack: 16MB, max heap: 8MB, pool: riak_kv_js_reduce)
host starting (<0.152.0>)

=INFO REPORT==== 1-Apr-2011::12:06:51 ===
Spidermonkey VM (thread stack: 16MB, max heap: 8MB, pool: riak_kv_js_reduce)
host starting (<0.153.0>)

=INFO REPORT==== 1-Apr-2011::12:06:51 ===
Spidermonkey VM (thread stack: 16MB, max heap: 8MB, pool: riak_kv_js_reduce)
host starting (<0.154.0>)

Please help .

--
Santhosh
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