2,039 reputation
1422
bio website vade.ie
location Ireland
age 29
visits member for 5 years, 4 months
seen 2 days ago
never ending interesting boringness

Aug
5
comment How big (in bits) is a Unix UID?
Most systems use /etc/login.defs which does have UID_MAX set for the highest usable UID value, 60000 on any system I've checked.
Jul
8
comment Postfix forwarding to GMail address
If the original mail is coming from gmail, then this is definitely what is happening. Gmail fingerprints the mails based on the headers to deduplicate them. Forwarders without any header modification can get caught by this.
Jul
7
comment Invalid format output from ps etime
NTP doesn't run through cron but adding some other traps around the commands points to time being the issue. The commands all have just started or died when we catch them like this.
Jul
3
comment Invalid format output from ps etime
etimes isn't supported by ps on this host. Its old and due to be upgraded. I'll add that any time the invalid format comes back, 1158050441-07:00 is constant. Its only the seconds that change.
Jun
20
comment How to find slave's IP address and user name from Master server?
Check for a line saying "Binlog Dump". Host usually appears up there.
Feb
11
comment RSAT and double accounts
I've since moved back to being a FT Linux admin instead of FT Windows admin so I can't test this method with Hyper-V but it seems like a good solution to cover most of the issues.
Sep
27
comment Puppet Agent fails sporadically, with either timeout or “Could not find class” error
Most likely the server was swapping or getting memory faults. We track our puppet server that way but we have a few more nodes than you. Puppet compiles the manifests for each server before sending them out which eats memory. If you do increase the number of nodes, switch to a different server for running puppet.
Nov
23
comment pam authentication failure, yet sudo and ssh work
There is too many configs around the internet which do not include this line in their ldap setup guides.
May
6
comment Lync Server 2010 with Hosted VoIP PBX
We have service from Broadvox in the US.
May
5
comment Help me make sense:VLAN, Hyper-V, Intel VMLB
One of our Intel Nics has it under the drive configuration -> advanced options -> priority and vlan. Other was enabled during the team setup.
May
4
comment key efficiency 99.97% mysql
The cache hit rate depends highly on the application running against the DB. If you control the application, you should be able to get a very high hit rate. If you don't, (and it is poorly written), you can expect some really low values.
May
2
comment Why does a 32-bit server support 32GB RAM?
MSDN Article for PAE is msdn.microsoft.com/en-us/library/aa366796%28VS.85%29.aspx
May
2
comment Can an attacker sniff data in a URL over HTTPS?
Post data isn't in the logs.
May
1
comment Lync Server 2010 with Hosted VoIP PBX
Quite a few SIP providers support E911 which pass extra information per DID. Assuming your remote works get their own DID, you can get it going that way. In our setup, we map the users desk phone to their E911, and their home phone sends out the same callerid. The other users are handled by an in-between service which answers the called before 911 one gets it. It however is something like 50USD per call.
Apr
30
comment Failover Cluster : Microsoft Exchange Server 2010
You can get around the shared storage requirement by doing the CAS array and having 1 node on each server, then use the DAG across the two servers. The hardware load balancer isn't totally necessary when using NLB on the hosts, just watch for all the broadcast traffic on the vlan.
Apr
30
comment High Availability DNS Hosting Strategy?
If you can get your existing provider to enable XFER transfers, the new host can copy the entire DNS zone in a single command. Then it is just a case of swapping the name servers.
Apr
29
comment Correct way to set up DNS primary/secondary/… for redundancy and latency reduction?
The default linux config doesn't cache down'd nameservers. This applies also to a few linux based appliances (such as our IP phones), which means that when the primary goes down, the dns queries take so long because every query tries the primary, waits 5 seconds, then tries the secondary, that things basically stop working under load.
Apr
29
comment Correct way to set up DNS primary/secondary/… for redundancy and latency reduction?
Most linux clients default to a 5 second timeout which is a killer. Second DNS server or not, once the primary is down, it'll be so slow, it'll appear down.
Apr
29
comment Avoiding DNS timeouts when a dns server fails
What happens when your production hours are 24x7? DNS should fail to the second/third/x server AND cache the failure of the other server for a period. The Default 5 second timeout is enough to bring services down depending on the load.
Apr
29
comment Is there a Linux utility that can distribute files to an array of hard disks, like a load balancer, but for storage?
Raiding file systems across remote systems already exists. On large scale you have GFS (and quite a few other proprietary ones). Coda is a smaller scale on which would properly work, but for this why would you bother?