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612
bio website google.com
location Geosynchronous orbiting HQ
age 94
visits member for 5 years, 1 month
seen 2 days ago
Linux geek

Mar
31
answered How does BTRFS compare to ZFS?
Mar
31
answered How to make `rm` faster on ext3/linux?
Mar
17
answered Why is reading from my lvm mirror slower than reading from the individual disks?
Feb
20
answered A tool to acquire tasks
Jan
8
comment cause for high Interrupts and context switches
To be pedantic, entering the kernel is only needed when the lock is contended, or when waking up waiting tasks. See en.wikipedia.org/wiki/Futex
Jan
7
answered Is my new Oracle DBA talking sense
Jan
5
awarded  Autobiographer
Jan
5
awarded  Commentator
Jan
3
answered *nix measure memory usage
Jan
3
comment Does HTTPS use TCP or UDP?
Or if the packets arrive out of order, as UDP contains no provisions for reordering packets like TCP.
Dec
28
comment Centralized accounts and multiple logins
@Jim B - POSIX locks are advisory, so there's no difference between NFS and local fs locking in that respect.
Dec
24
answered How to resume kickstart in RedHat?
Dec
23
answered How to extend a SAN-based Vdisk in Red Hat without rebooting?
Dec
23
comment Splitting a shared pool of disks in a SAN into numerous LUNS
@Chopper3: FWIW, we haven't had any reliability issues with FATA disks. But yeah, they're big and slow so rebuilding takes time; VRAID6 helps me sleep at night.
Dec
23
comment Splitting a shared pool of disks in a SAN into numerous LUNS
@sysadmin1138 Yeah as a rule of thumb you should avoid having disks with wildly different performance or capacity in the same disk group. In practice we tend to have all FC disks in one group and all FATA disks in another. There is some capacity and potentially performance loss from having different capacity disks in the same group (when we expand new disks are often bigger), but OTOH as Chopper3 said there is a benefit from having as few DG's as possible, so it's a compromise.
Dec
23
comment Splitting a shared pool of disks in a SAN into numerous LUNS
I'm not sure where you're actually disagreeing with ynguldyn? The question was whether to have a single LUN (~vdisk) or multiple LUN's on the same pool (~disk group). And ynguldyn says there's no performance difference, which is correct. Also, to be pedantic, EVA's don't have hot standby disks, they use distributed sparing.
Dec
23
answered Tuning NFS client/server stack
Dec
22
answered Time sync in data center
Dec
3
answered How to profile for HDD usage pattern?
Dec
2
answered Performance differences between 2.5“ vs. 3.5” SAS