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Senior Systems Engineer with a Linux, virtualization and performance-tuning focus.

Careers.SE: http://careers.stackoverflow.com/edmundwhite

LinkedIn: http://www.linkedin.com/pub/edmund-white/7/588/147

ewwhite AT mac.com


Nov
18
comment attach existing vmdk to windows server without formatting
How did you lose the disk descriptor file? Can you fill in that detail?
Nov
18
answered Combine 2 logical raid 0 drives to 1 logical raid 1 drive
Nov
18
comment Disabling cache on ZFSonLinux
This is beyond the scope of this question. The answer is: it depends.
Nov
18
comment Disabling cache on ZFSonLinux
@Devon logbufs is for XFS. You have a battery-backed write cache on your RAID controller. It's fine to use "nobarrier".
Nov
18
comment Disabling cache on ZFSonLinux
@Devon I don't use ext4 on top of ZFS. I use XFS, though. I haven't had any abnormal signs of overhead. Are you mounting your filesystems with nobarrier, or if using RHEL/CentOS, using the tuned-adm enterprise-storage profile?
Nov
18
comment best way to create perfect mirror of zfs based backup server
Nobody uses Nexenta anymore!
Nov
17
awarded  Caucus
Nov
17
comment SSD as cheap alternative to SAN storage?
Basic question about the hardware in use... without that info, it's hard to make a real recommendation.
Nov
17
comment Combine 2 logical raid 0 drives to 1 logical raid 1 drive
Please post it in your question.
Nov
17
comment SSD as cheap alternative to SAN storage?
USB3 is unlikely to be present on the server hardware being described.
Nov
17
comment SSD as cheap alternative to SAN storage?
What are the makes/models of the servers involved? Do you need this storage to be presented to VMware, or are the DB servers physical?
Nov
17
revised Combine 2 logical raid 0 drives to 1 logical raid 1 drive
edited tags
Nov
17
comment Combine 2 logical raid 0 drives to 1 logical raid 1 drive
What operating system is this? Can you please show the output of the hpacucli (or hpssacli) utility using the ctrl all show config and ctrl all show config detail commands.
Nov
17
comment Cause of page fragmentation on “large” server with xfs, 20 disks and Ceph
@pingu Any feedback?
Nov
17
comment FreeBSD determine if reboot was due to power loss
@Kondybas Yes, this is a scary log. It's a very bad example using 9 year-old batteries.
Nov
17
comment Linux http(s) load balancer with webGUI
Does it need to be free? Because Riverbed makes an excellent commercial software load balancer that runs atop Linux...
Nov
17
revised FreeBSD determine if reboot was due to power loss
added 85 characters in body
Nov
17
comment VMware Vmotion 5.1 fails at 51% , Between two identical new vmware servers
Please show the network configuration screenshot from the vSphere client, as in this example.
Nov
17
comment High CPU on MySql Fusion-io server
I wish you would have posted the information I asked for.
Nov
17
answered FreeBSD determine if reboot was due to power loss