Howdy!
Not a matter of life or death, just curious.
I've just stood up a three node cluster (v1.2.8) on three c3.2xlarge boxes
in AWS. Silly me forgot the correct replication factor for one of the
needed keyspaces. So I changed it via cli and ran a nodetool repair.
Well .. there is no data at all in the keyspace yet, only the definition
and nodetool repair ran about 20minutes using 2 of the 8 CPU fully.
Any hints what nodetool repair is doing on an empty cluster that makes the
host spin so hard?
Cheers,
Sven
==========================
Tasks: 125 total, 1 running, 124 sleeping, 0 stopped, 0 zombie
Cpu(s): 22.7%us, 1.0%sy, 2.9%ni, 73.0%id, 0.0%wa, 0.0%hi, 0.4%si,
0.0%st
Mem: 15339196k total, 7474360k used, 7864836k free, 251904k buffers
Swap: 0k total, 0k used, 0k free, 798324k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
10840 cassandr 20 0 8354m 4.1g 19m S 218 28.0 35:25.73 jsvc
16675 kafka 20 0 3987m 192m 12m S 2 1.3 0:47.89 java
20328 root 20 0 5613m 569m 16m S 2 3.8 1:35.13 jsvc
5969 exhibito 20 0 6423m 116m 12m S 1 0.8 0:25.87 java
14436 tomcat7 20 0 3701m 167m 11m S 1 1.1 0:25.80 java
6278 exhibito 20 0 6487m 119m 9984 S 0 0.8 0:22.63 java
17713 storm 20 0 6033m 159m 11m S 0 1.1 0:10.99 java
18769 storm 20 0 5773m 156m 11m S 0 1.0 0:10.71 java
root@xxx-01:~# nodetool -h `hostname` status
Datacenter: datacenter1
=======================
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
-- Address Load Tokens Owns Host ID
Rack
UN 10.1.2.11 107.47 KB 256 32.9%
1f800723-10e4-4dcd-841f-73709a81d432 rack1
UN 10.1.2.10 127.67 KB 256 32.4%
bd6b2059-e9dc-4b01-95ab-d7c4fc0ec639 rack1
UN 10.1.2.12 107.62 KB 256 34.7%
5258f178-b20e-408f-a7bf-b6da2903e026 rack1
root@xxx-01:~# nodetool -h `hostname` compactionstats
pending tasks: 1
compaction type keyspace column family completed
total unit progress
Active compaction remaining time : n/a
root@xxx-01:~# nodetool -h `hostname` netstats
Mode: NORMAL
Not sending any streams.
Not receiving any streams.
Read Repair Statistics:
Attempted: 0
Mismatch (Blocking): 0
Mismatch (Background): 0
Pool Name Active Pending Completed
Commands n/a 0 57155
Responses n/a 0 14573
