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visits member for 1 year, 10 months
seen Apr 8 at 15:50

Apr
1
comment How to setup an automatic failover firewall?
As Matt's answer says, keepalived is the simplest way as it covers a lot of the management but IPVS has been included in the kernel since 2.4.something. You probably still need to add the admin tools to use a VRRP address. I've never tried it without keepalived though.
Mar
31
comment How to setup an automatic failover firewall?
linuxvirtualserver.org/HighAvailability.html
Mar
12
comment Howto configure openSuSE firewall to route local traffic to local ports
The firewall will be iptables based though and it's definitely capable of applying rules 'inside'. If you can't configure it via SuSefirewall then you could add them manually.
Mar
3
comment How to ping ipv6 interface
or ping6 -I eth1 ...
Feb
11
comment Block employee access to public cloud
#1. Doesn't have to be that drastic. Network segregation is a valid solution where public access points don't have to run from your internal or secure corporate network. If you provide a simple, audited interface to shift data between the two you get a better idea of what data does need to come and go.
Jan
16
comment Apache httpd 2.2.16 creates new sessions every time
The requests going to tomcat1 are parsing a completely different JSESSIONID: (J2EE4847100)ID1435349250DBfa8033a3ce4db1f64ba8d682cf8c5736533dc780End Do you know where that comes from?
Jan
13
comment Apache httpd 2.2.16 creates new sessions every time
So it's just the load balancer that is failing to balance any more. Does one of the balance members get marked offline, even for a tiny amount of time? Your log snippits imply it happens on both as you have both 01 and 02 in there but just checking
Jan
13
comment Something eats all memory on my server, but it is NOT fs cache
even RES can't be entirely trusted... but in your case where you have single processes taking huge amounts of memory the % error is small. It fails if you are totalling the RES of an apache httpd processes with 100 children in which you get a huge error due to shared memory.
Jan
13
comment Something eats all memory on my server, but it is NOT fs cache
@Daniil ignore the VIRT column, it doesn't relate to used physical memory.
Jan
13
comment Something eats all memory on my server, but it is NOT fs cache
Can you cat /proc/meminfo and also run ps_mem.py to get a better idea of process memory usage.
Jan
13
comment Apache httpd 2.2.16 creates new sessions every time
Do you have some example request logs from when the issue occurs? Does a request with a JSESSIONID at httpd pass to Tomcat without a JSESSIONID?
Jan
8
comment Remove Corrupt File With Bad File Name Linux
a double dash ends generally help with file names starting with a - character, so they don't get interpreted as arguments
Jan
6
comment Use one volume for multiple EC2 servers
@ceejayoz yes, but only for writes of new objects. eveything else is still eventual.
Jan
4
comment hyper-v server time sync source - PDC / external NTP?
plan 3 =)
Jan
4
comment Use one volume for multiple EC2 servers
You can use s3fs via FUSE to make an S3 bucket look like a local filesystem and copy files into it, just remember that even though it looks, walks and quacks like a file system, it's not a real file system and has eventual consistency
Sep
26
comment How do services with large ingest rates install enough hard disks fast enough?
Not all of them
Sep
26
comment How do services with large ingest rates install enough hard disks fast enough?
Someone still has to build/connect/test the shipping container server at a time and google/facebook tend to do their hardware in house.
Sep
26
comment How do services with large ingest rates install enough hard disks fast enough?
Another facet to think of is drive failure rates with that much storage and how they keep up. Some people have estimated Google might have a new drive failure somewhere every minute.
Sep
26
comment How do services with large ingest rates install enough hard disks fast enough?
The open vault specs are online. With 4TB drives they are up to 120TB in 2U.
Sep
24
comment How do I force apache to drop requests after a predetermined amount of time?
TCP was certainly made to provide for high latency networks but I'm not sure that precludes it working with low latency requirements. If you control the recv/send ends (and hopefully the network in between) I don't see TCP as the limitation. Most applications and/or stacks can be tuned to prefer low latency/small packets than higher through put that can introduce packet delays. Apache httpd on the other hand...