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Jan
13
comment ext4 production ready on kernel 2.6.32 (debian6)?
By backports I meant porting linux kernel features from recent kernels back to 2.6.32 without breaking API/ABI e.g. new versions of drivers or sometimes new features.
Jan
12
comment ext4 production ready on kernel 2.6.32 (debian6)?
It's worth mentioning that RedHat 2.6.32 has a bunch of redhat-specific backports from recent kernels, so it can not be compared to Debian's.
Jan
11
comment Linux - NTP stopped working after recent update
restrict -6 ::1?
Oct
29
comment Should I set rto_min for a route inside data center?
@Janning max latency is proportional to cumulative size of all buffers along the way. Speed of light is negligible in your case.
Oct
28
comment Should I set rto_min for a route inside data center?
I guess rto_min should be set not with regard to current latency, but w.r.t. sizes of buffers along the way and bandwidth. For example in presence of traffic bursts switch/router can hold frame/packet for couple of milliseconds.
Sep
12
comment High CPU usage in random IP/Port UDP DDoS
Oops - thanks for noticing it!
Sep
11
comment High CPU usage in random IP/Port UDP DDoS
Using ipset in blacklist mode won't help against UDP flood with random source IPs.
Aug
19
comment continous kernel EIP errors
If it's always in filesystem/journal related code then there is a change that fsck will help. PS. Also it's better to cut and paste starting from line ------------[ cut here ]------------
Jul
26
comment Join multiple filesystems (on multiple computers) into one big volume
To be taken seriously in Infiniband world ceph needs to implement native verbs interface. But still even with IPoIB on >= 12xQDR Infiniband ceph should be faster than 10G Ethernet interconnect.
Jul
12
comment How do I make OOM Killer more passive
I'm just used to it because it has -e flag that I was using when swapping on external flash drive. Here, yes I guess it's rather useless.
Jul
11
comment How do I make OOM Killer more passive
btw, vm.overcommit_ratio is used iff vm.overcommit_memory == 2, but default value is 0: lxr.free-electrons.com/source/mm/mmap.c#L134
Jul
2
comment Netstat -s showing (and growing) “packets pruned from receive queue” and “packets collapsed in receive queue”
Can you show output of sudo ss -lnp?
Jun
29
comment Does orientation affect hard drive lifespan?
May it be that just 99% of all laptops have HDD mounted upside down, so there is actually no correlation at all?
Jun
27
comment Yesterday-access.log is pointing to a different directory
This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post - you can always comment on your own posts, and once you have sufficient reputation you will be able to comment on any post.
May
5
comment Chef stop and start service in sequence
Oops... My bad. Mistakenly rejected edit. Actually new versions of chef support not only resources(:service => "apache") but also "service[apache]" syntax. Just verified with 11.4.4. See docs at: docs.opscode.com/resource_common_notifications.html
Apr
22
comment ack-grep to ack in ubuntu
Am I the only one who thinks this is not secure?
Mar
3
comment Segfault PHP-FPM, Nginx, Freebsd
What is you APC version?
Feb
28
comment Segfault PHP-FPM, Nginx, Freebsd
Also, if you are not confident about debugging C/C++ code then you better off with something like updating APC/php from ports maybe with even slightly different make config
Feb
28
comment Segfault PHP-FPM, Nginx, Freebsd
set sysctl kern.coredump=1 and sysctl kern.corefile="/var/tmp/%U.%N.core" - path should have according permissions (i.e. 1777). Also don't forget to turn them off after debug.
Feb
25
comment Segfault PHP-FPM, Nginx, Freebsd
Turn on coredumps and analyze segfault dump with gdb - for the start simple bt is enough