97,787 reputation
14146344
bio website 500px.com/ewwhite
location Chicago, IL
age 34
visits member for 4 years, 11 months
seen 25 mins ago

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


2h
comment Add JVM monitoring to opennms via snmp
This would be best for one of the OpenNMS mailing lists, especially as you haven't specified version or build information.
2h
comment Centos server gave blue screen
Not much information to go on. What type of hardware was the datacenter using? Is it your gear? Do you have IPMI? Is Supermicro involved?
2h
comment 'Please configure a fully qualified domain name' Error
The HOSTNAME variable should probably just be "mail". You'd need to restart the network service; service network restart following that. You may also just reboot. Either way. Don't touch any of the localhost/localdomain entries.
3h
comment 'Please configure a fully qualified domain name' Error
What you have for website1.com and website2.com is fine. I was just trying to get you past your mail configuration
7h
comment RAID Configuration P2000 and Dynamics AX 2012R2
Why wouldn't you use larger groupings of drives?
10h
comment How to [politely?] tell software vendor they don't know what they're talking about
@SimonCatlin you don't need to buy it. You can download the demo for free and use it for 60 days. It's perfect for this type of situation.
1d
comment Centos server keeps jumping to address instead of static assigned address
Or just stop the service.
1d
comment How do I configure RAID 5, especially stripe size, with 24 x 1.2 TB drives for CentOS 6?
@SteveAmerige Don't modify the stripe size from default on the controller. And definitely don't mess with the ext4 options.
1d
comment How do I configure RAID 5, especially stripe size, with 24 x 1.2 TB drives for CentOS 6?
Is this data compressible at all?
1d
comment Rear Rack Ears for Dell PowerConnect 2824 Switch
I'm having a hard time envisioning what you're describing. What are you trying to do?
1d
comment How do I configure RAID 5, especially stripe size, with 24 x 1.2 TB drives for CentOS 6?
@HopelessN00b You can safely use RAID5 with enterprise SAS disks... even 900GB and 1.2TB... but in groups of 8 or less. But here, the OP still hasn't answered exactly how much usable space is required.
1d
comment How do I configure RAID 5, especially stripe size, with 24 x 1.2 TB drives for CentOS 6?
@SteveAmerige More detail! The RAID 5 is a non-starter. You just should NOT use it in 2014. What type of data is this? What would the virtualization technology be? KVM? VMware? I think the design here really needs some refinement, especially before investing in so much hardware... Do you know what the size of the "working set" of data will be per-VM? In instances where that value is known, you can cache and optimize around that. Tiered storage. SSDs. Is the workload read-biased or write-biased?
1d
comment How do I configure RAID 5, especially stripe size, with 24 x 1.2 TB drives for CentOS 6?
@SteveAmerige How much disk space do you need? You can't USE 24 disks in one RAID group, so there are some additional design considerations for your environment. Can you tell us what this system is here to do, what type of data is involved, and what the real performance requirements are?
1d
comment How do I configure RAID 5, especially stripe size, with 24 x 1.2 TB drives for CentOS 6?
@Tonny I verified this. 16-disk maximum for that controller.
1d
comment Seemingly Random Components on DL380 G5 No Longer Work After Applying Updates
Did you remove the existing drivers first?
1d
comment How do I configure RAID 5, especially stripe size, with 24 x 1.2 TB drives for CentOS 6?
Can you provide some context on the read/write workload and the application for this storage solution?
1d
comment Hot spare host vs cold spare host?
On my HP servers, the early ECC thresholds are exceeded and trigger an alert. The RAM is usually replaced before there an impact to applications. I see it about 10 times a year across a few hundred servers.
1d
comment Hot spare host vs cold spare host?
Sandra works in mysterious ways...
1d
comment Vmware/Linux 64 vs 32 bit
@IanMacintosh Do not run a standalone ESXi host off of a USB key/SD card (without shared storage). It's bad advice.
1d
comment Hot spare host vs cold spare host?
Oh, definitely. If I have replication solutions, there's also an RPO/RTO consideration and offset (10-15 minutes) to cover the above scenarios.