BTW - can a moderator please unlock this question as it's obviously not localised as I'm seeking exactly the same answer. LSI Logic controllers are incredibly common, setting up RAID 10 is natural — Rob Nicholson5 mins ago
Without changing my patterns to match the whole string (which would make them a lot more complicated), is there a way to use the current URI in the substitution string?
Using %{REQUEST_URI} won't work, as that uses the original URI.
@MichaelHampton Yup. Just wanted to get it out there that it's really easy to modify a regex to add a capture of the whole string. He probably will not appreciate.
Hello,
This is to inform you that we are proceeding with the name change of the following servers now:
not_brazzers-noo-stageapp1v ----> not_brazzers-noo-prodapp3v
As you are already aware, this will require a reboot. We will inform you once this is complete. Let us know if you have any questions. Thank you.
I'm making some system hostname changes across a few environments and this got me thinking...
When I change a server's hostname (live), what needs to be modified and which system services require a restart?
Assume this is done online without a reboot.
I encounter a lot of systems built by othe...
@ewwhite Hostname changes don't require a restart, but any app that relies on the hostname will use the old hostname until that application/service is itself restarted. If there are enough of these, then it's often simpler to just reboot the server.
@ewwhite I occasionally rename them during the initial setup, e.g. if I accidentally picked a name that was already in use. But never after they've gone into production.
"We have received an alert that SNMP are not running correctly on scrog-db1. We require the SNMP service to run to receive critical information on the health of servers. A reboot is reboot in order for us to resolve this issue. Please let us know when we may proceed with the reboot. Thank you."
I followed this tutorial (though it's for 5.2, I figured I'd be alright).
The changes I had to make that seemed to have worked:
Rename ca.csr to ca.cslr (that's the one the command generated)
List it in the ssl.conf as ca.cslr instead of ca.csr
I have the following in the httpd.conf
<Virtua...
I've only had to rename a whack of servers once, and that was to move them into a new subdomain. Like @MichaelHampton said, for a system that really only has one or two services, it's easy enough to restart them.
Whoa, did something change in flags? I was just declined [correctly] on a recent flag, but my helpful flag count jumped by quite a bit. I was even given a Marshall badge.
@ewwhite The thing that I've found saves it a bit is a good fast ZIL. The dedup work happens after it hits the ZIL device, so the dedup doesn't slow down your effective write speed unless the ZIL gets full.
Almost all of use have heard of Ted Stevens trying to describe the Internet with the analogy that it is a series of tubes (mp3). I believe that it likely that some tech person somewhere tried to describe the Internet to him and this was the best analogy they could come up with.
What analogy wou...
@Jacob Don't mention it... I don't even remember what you said. I was into my... sixth? ... vodka on the rocks. Something about FiOS or Verizon or something. Anyway, I didn't take offense at the time and I still don't... don't sweat it. :)
@RyanRies That was 4 years ago. The site didn't have the content standards that we have now. If anything, it should be protected & closed off as historical information but not something that should be considered a good modern question. If you have questions, ask @voretaq7
I'm using Nexentastor on a secondary storage server running on an HP ProLiant DL180 G6 with 12 Midline (7200 RPM) SAS drives. The system has an E5620 CPU and 8GB RAM. There is no ZIL or L2ARC device.
Last week, I created a 750GB sparse zvol with dedup and compression enabled to share via iSCSI ...
I have an HP ProLiant DL380 G7 server running as a NexentaStor storage unit.
The server has 36GB RAM, 2 LSI 9211-8i SAS controllers (no SAS expanders), 2 SAS system drives, 12 SAS data drives, a hot-spare disk, an Intel X25-M L2ARC cache and a DDRdrive PCI ZIL accelerator. This system serves NFS...
@ShaneMadden To hold the Deduplication tables. The DDT size is a function of how many and what types of files are being stored. When I was backing up big file servers and deduplicating an iSCSI export from Nexenta, the DDT grew to ~16GB for 1TB of backups.
@KevinSoviero What I was trying to tell you last night was that George(@zypher) spend 1 hour or so at a conference convincing me to go to college. Several other people had as well. So sadly it seems that people still want to see it. Try Google, I've heard they've lax'd a bit on hiring?
@KevinSoviero ZFS term. It's usually a fast SSD that caches for the slow disks. It's level 2 because RAM is level 1; it gets stuff that's flushed out of the RAM cache.
@Jacob Actually, I'm in the Austin office... It's just a regular office... Though we do have all you can drink sodas of every flavor... So, there's that.
@MichaelHampton I saw you edited my tag wiki edit, but then community approved it unchanged- what were you thinking could be improved, out of curiosity?
@Jacob It's not supposed to be extraordinarily difficult. There is some algorithm that is allegedly supposed to select uncontroversial decisions for the audit.
actually the change to closures broke a lot of things... for instance I can still start to make a close vote and view the close queue when I'm out of close votes for the day as always.
@Andrew Sweet.
@MichaelHampton Gah, why am I so inobservant today?
According to http://docs.cpanel.net/twiki/bin/view/AllDocumentation/WHMDocs/DomainsIps if you enable "Automatically send outgoing mail from the account's IP address instead of the main IP address":
This option allows you to automatically send outgoing mail from your account's IP address inste...
@FalconMomot RAID1 with (supposedly) grub on both disks. I'd like to get more info on the grub code though (e.g. is it trying to boot "device2" when "device2" doesn't exist because it's become "device1" etc.)
A question that mentions cpanel is not de-facto off-topic.
It is possible an otherwise competent admin inherited a cpanel disaster and now has to make it work.
HOWEVER - If you are limiting yourself to just "what can be done from within cpanel" you're no longer a sysadmin in my view - you're an ...
@Jacob well, yes, of course. But the main point is that problems while just using its GUI to perform administration tasks are (if more about the cpanel interface than the admin task) OT.
if the answer to the question is about how to work around cpanel though, and not what to put in the config it is giving you, it should be closed with a comment "open a terminal and make your change. then, uninstall cpanel."
@ScottPack So if I'm running an rsync server serving up the same files to 100+ clients, will each and every run be a unique "cache" or will it be slow the first time, then fast each other time
I suppose it depends on the files. In theory you should be able to. The memory management subsystem, assuming they are happening at nearly the same time, will strip off a lot of the disk reads.
You can also do some tweaks to your rsync.
For example, by using the -W option it will only run the whole file checksum and copy based on that. The downside is that the entire file will be copied, even if only 1 byte changed, but the upside is that it will skip the sliding window checksum.
That will result in more network IO, but less disk and less cpu.
I assume.
I've never really analyzed how to make rsync awesome. I'm just kind of spitballing here.
@ScottPack well right now our bottleneck is definitely that if you attempt multiple rsyncs from the artifact server to web servers, rsync will do that synchronously
What happens behind the scenes when we type www.cnn.com in a browser and how does information gets displayed on the screen?
A technical explanation would be highly appreciated.
I am using a modem, and it shows a download speed of n kbps and an upload speed of m kbps. When I check its logs, it shows the amount of data downloaded and uploaded. I'm wondering why it shows that I've uploaded 3 MB of data in an hour, which seems excessive when I never upload anything or use t...
Without changing my patterns to match the whole string (which would make them a lot more complicated), is there a way to use the current URI in the substitution string?
Using %{REQUEST_URI} won't work, as that uses the original URI.
I followed this tutorial (though it's for 5.2, I figured I'd be alright).
The changes I had to make that seemed to have worked:
Rename ca.csr to ca.cslr (that's the one the command generated)
List it in the ssl.conf as ca.cslr instead of ca.csr
I have the following in the httpd.conf
<Virtua...
Almost all of use have heard of Ted Stevens trying to describe the Internet with the analogy that it is a series of tubes (mp3). I believe that it likely that some tech person somewhere tried to describe the Internet to him and this was the best analogy they could come up with.
What analogy wou...
According to http://docs.cpanel.net/twiki/bin/view/AllDocumentation/WHMDocs/DomainsIps if you enable "Automatically send outgoing mail from the account's IP address instead of the main IP address":
This option allows you to automatically send outgoing mail from your account's IP address inste...
What happens behind the scenes when we type www.cnn.com in a browser and how does information gets displayed on the screen?
A technical explanation would be highly appreciated.
