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Linux geek

Dec
30
comment Cannot increase MTU on gigabit network
@Sirex: 20% under what circumstances? @work I just measured 940 Mb/s using iperf without jumbo frames, which is 94% of the theoretical maximum, so a 20% improvement is just impossible in that case. (CPU usage was 5% of one core on the sender and 1% on the receiver; not only CPU's but also NIC's and the network stack in OS'es are different from 10 years ago.)
Dec
29
comment Cannot increase MTU on gigabit network
Or just forget about jumbo frames; it's not like they make much difference with current CPU's @1Gb.
Dec
29
comment What can cause kernel out_of_memory error?
He's using the RHEL5 kernel which has a lot of patches on top of vanilla 2.6.18, and gets security updates from the vendor. That being said, 2.6.18-164.9.1 is old and has several more or less serious vulnerabilities (newest EL5 kernel ATM being 2.6.18-194.26.1).
Dec
26
revised Optimal file system type and mount options for an rsnapshot dedicated drive
mention disabling barriers
Dec
26
answered Optimal file system type and mount options for an rsnapshot dedicated drive
Nov
25
answered Migrating the SAN lun in Linux
Nov
18
answered A few CPU related questions. Linux RT
Nov
15
comment What is the function in Windows similar to Inode in Linux?
You mean the inode number of a file, or?
Nov
15
comment Accessing file on XFS partition over NFS locks up application
@pehrs: That's not the relevant choice, though. In reality, it's "lose data and don't get any indication which writes failed" vs. "wait until the server comes back online, or explicitly kill the app (with intr), or reboot the client"
Nov
15
comment Accessing file on XFS partition over NFS locks up application
@pehr: Yeah, well, soft mounts are quite convenient, at least until you lose data. ;-)
Nov
15
revised Accessing file on XFS partition over NFS locks up application
Respond to updated Q
Nov
12
answered Accessing file on XFS partition over NFS locks up application
Nov
11
answered Mirrored and stripped HD drives in Raid10
Nov
9
comment setting up a password for cron rsync over ssh
+1 ssh command keys or scponly/rssh is the correct approach.
Nov
9
answered Best practices to prevent 'rm -rf /' in bash scripts
Nov
8
answered Which shared library requires another shared library?
Nov
8
answered How do I find out which application prevents the drive from going to sleep
Nov
7
revised lpfc + multipath + ubuntu - path keeps switching
explain why 4 paths
Nov
6
revised lpfc + multipath + ubuntu - path keeps switching
added 38 characters in body
Nov
6
answered lpfc + multipath + ubuntu - path keeps switching