565 reputation
210
bio website zlynx.org
location Greenwood Village, CO
age 40
visits member for 5 years, 6 months
seen Dec 11 at 6:35

Nothing interesting about me. This is not the user you are looking for. Move along. Move along.


Dec
5
comment Linux - Is there a way to prevent/protect a file from being deleted even by root?
Taking this a bit further, you can use squashfs or cramfs which are compressed and read-only. It needs a special tool to build the filesystem.
Nov
22
comment Write caching in linux
I am not sure about Windows but Linux may defer non-sync writes up to the sysadmin's configured time. Defaults are 5 or 60 seconds depending on the filesystem.
Nov
22
comment Would the data on the RAID Card Cache and Drive Cache be lost when a kernel panic happens?
The machine's power distribution board or motherboard might also fail. Although personally I've seen more RAID card failures.
Nov
18
comment TCP Dump, cannot understand these 4 lines?
That can also be caused by a messed up router/firewall. See lwn.net/Articles/92727
Aug
16
awarded  Citizen Patrol
May
22
comment Packet loss on between firewall and uplink?
I've seen these intermittent problems caused by either bad cable or failing ports combined with link autonegotiation. It glitches and thinks it is 10Mbit half, for example. It might work fine forever just by forcing the connection type. Remember to do both ends.
May
22
answered Why drop caches in Linux?
Apr
15
comment 4TB drives using an ARC-1231 controller?
@StefanLasiewski: A new RAID controller is as likely to fail as an older one. If really new, even more likely.
Apr
9
answered Guaranteeing Shell Responsiveness on Pegged System
Apr
9
comment Why is 1 of my 24 CPUs Pegged at 100%?
Couldn't that also be a driver bug or a piece of bad hardware interacting with a driver with no error recovery? Or maybe software calling into the kernel in a tight loop.
Mar
31
comment Force edit txt file that is in use windows
I remember seeing programs that would forcably break file locks. I believe they did it by attaching to each process with the lock and closing the file handle from inside the process.
Mar
5
answered troubleshooting out of memory error messages from mysql
Oct
16
awarded  Popular Question
Feb
22
answered Serving html from linux ramdisk
Mar
2
awarded  Yearling
Feb
16
comment Tuning Linux disk caching behaviour for maximum throughput
@PeterMeyer: Even if you have a lot of RAM it is still a mistake to wait for writes to start. The only time that makes any sense at all is if you are going to be editing or deleting files (like a temporary file) before it would get to disk. A backup does not do that. You want to start background writes as soon as possible. Set your background_ratio to 1 or 2.
Feb
15
comment Tuning Linux disk caching behaviour for maximum throughput
Wouldn't it make more sense to start writing as soon as possible? Otherwise it reaches the maximum buffer size and suddenly comes to a halt. If it was writing all along it gives you more time.
Dec
13
comment How do I speed up and cache mmap file access over NFS on Linux?
I added some info about proc mounts to the question.
Dec
13
revised How do I speed up and cache mmap file access over NFS on Linux?
Add details about autofs and proc mounts.
Dec
13
comment How do I speed up and cache mmap file access over NFS on Linux?
@DavidSchwartz: Right. Since these are virtual systems there aren't any real local disks. It's all virtual. The "local disk" is a VMware image backed by iSCSI.