[CentOS] DRBD very slow....
Roman Savelyev
centosmail at savelyev.netFri Jul 24 06:21:42 UTC 2009
- Previous message: [CentOS] DRBD very slow....
- Next message: [CentOS] DRBD very slow....
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
1. You are hit by Nagel alghoritm (slow TCP response). You can build DRBD 8.3. In 8.3 "TCP_NODELAY" and "QUICK_RESPONSE" implemented in place. 2. You are hit by DRBD protocol. In most cases, "B" is enought. 3. You are hit by triple barriers. In most cases you are need only one of "barrier, flush, drain" - see documentation, it depens on type of storage hardware. >> The highest speed I can get through that link with drbd is 11 MB/sec >> (megabytes) >> >> But if I copy a 1 gig file over that link I get 110 MB/sec. >> >> Why is DRBD so slow?
- Previous message: [CentOS] DRBD very slow....
- Next message: [CentOS] DRBD very slow....
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
More information about the CentOS mailing list