Eric, some things that come to mind:
- have you verified with iotop what is using the I/O? - or both nodes up to date? No sync running? - in case of protocol C: issue with the network connection? Failed bonding cards? Drop of NIC speed? B. ----- "Eric Robinson" <[email protected]> schreef: > > This iowait thing is driving me batty. The system was running fine for a long > time at about 1-7% iowait except during backups. During backups iowait is > usually pegged at 25%. But recently, the system has started running at 25% > iowait all the time , with periods of 50% iowait and peaks of 70-90%. This is > a relatively sudden development. > > The server is 4-core PowerEdge 2950 with 8GB of RAM and 6x300GB 7.5K SAS > drives in a RAID 5 array. All it does is FTP. It peaks at about 250 > concurrent FTP users. Average file size is about 80K. The backing device for > drbd0 is a 2TB LVM partition. The filesystem is ext3. Since kjournald is the > biggest consumer of disk iops, I will soon change the filesystem to mount > with 'noatime'. > > Any ideas? Is there something about using LVM+drbd+ext3 with a 2TB partition > (1.3TB used) that causes a sudden jump in disk wait? -- > Eric Robinson > > > Disclaimer - February 17, 2011 This email and any files transmitted with it are confidential and intended solely for [email protected] . If you are not the named addressee you should not disseminate, distribute, copy or alter this email. Any views or opinions presented in this email are solely those of the author and might not represent those of Physicians' Managed Care or Physician Select Management. Warning: Although Physicians' Managed Care or Physician Select Management has taken reasonable precautions to ensure no viruses are present in this email, the company cannot accept responsibility for any loss or damage arising from the use of this email or attachments. > _______________________________________________ drbd-user mailing list > [email protected] http://lists.linbit.com/mailman/listinfo/drbd-user
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