[DRBD-user] Doc update and Sync performance

Josh Aune ladros at gmail.com
Mon Jan 4 19:10:42 CET 2010

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

On Jan 4, 2010, at 4:47 AM, Lars Ellenberg wrote:

>>>> but during the initial sync after the DRBD device is created the sync
>>>> proceeds at less than 100 MB/s.  Below is the config file.  Am I
>>>> missing anything needed to bump up the initial sync speed?
>>>> Also, all bytes on the drives on both side are zeros, so the limitation seems to be in the crc32c processing.
>>> Did you look at top, vmstat or similar?
>> Yes, 87% cpu idle.  Nothing much really happening.
> Then this seems to be some other config problem.
> 	<shameless plug>
> Did you know we sell "DRBD Health Checks"?
> http://www.linbit.com/en/products-services/drbd-consulting/
> 	</shameless plug>

To be clear, you have seen checksum based sync speeds in excess of 100 MB/s and I have a problem with my environment?


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