@ewwhite I'm a linux nerd, and I've touched multipath, but it's been a while since I actually had to do anything with it (it keeps just working in the few places we use it)
Is this another crazy LVM on top of multipath on top of iscsi thing?
[root@prodmessage1v ~]# multipath -ll
Sep 14 22:28:34 | DM multipath kernel driver not loaded
Sep 14 22:28:34 | /etc/multipath.conf does not exist, blacklisting all devices.
Sep 14 22:28:34 | A sample multipath.conf file is located at
Sep 14 22:28:34 | /usr/share/doc/device-mapper-multipath-0.4.9/multipath.conf
Sep 14 22:28:34 | You can run /sbin/mpathconf to create or modify /etc/multipath.conf
Sep 14 22:28:34 | DM multipath kernel driver not loaded
In my experience, multipath and LVM really don't play well together, because LVM scans for devices at boot time, and with multipath the same device can show up 3 or more times.
When Microsoft Windows XP ends its Offical Update Support on April 8, 2014, is there any way of updating re-installed clients, offline? Like keeping a copy of Service Pack 3 for Windows XP and all of the additional updates for future use?
I could keep a copy of the hard drive in a GHOST IMAGE, b...
Specifically, maybe they created two 200G LUNs assigned to both servers (thinking that's how to make multipath work?), did a pvcreate on LUN from one server, pvcreate on the other LUN from the other server...
Basically, i'm confused how they even managed to make two volume groups with the same name... Maybe it involved some reinstalling of something along the way?
In summary: holy shit that setup is sooo fucking wrong that I'm having trouble comprehending how you could even accidentally get into that specific mess.
@ewwhite I do use LVM, but I don't use it on SAN LUNs.
One of the big advantages of LVM is that you can grow individual filesystems.
But you can already do that with SAN LUNs already.
Throw LUNs underneath LVM, and suddenly you have like 2 or 3 levels of scanning that need to happen to make the expanded LUN storage actually available to filesystems.
The kind of thing where you say "fuck it, maybe if we reboot this will work", and then somehow you end up needing to reboot twice...
VGs really need unique names, at least within the organization. I once had to deal with a situation where I had two VGs with the same name. That took me... probably a couple of hours to sort out. One of them has to be renamed.
What happened tonight was that a NOC technician responded to a client request to go from 200GB to 400GB on an iSCSI LUN. The SAN took 3 hours to resize... The NOC person ended his shift. The next person didn't know how to handle the LVM and OS-side expansion...
A senior engineer was called... and he didn't know either... so I got called...
and I looked, saw an expanded LUN... made fdisk changes... couldn't see data. Realized it was the wrong LUN expanded.
My wife is cursing my team and clients. Ruined the evening.
I've run out of enthusiasm... I was writing this PHP webapp at a fast pace, and finished 70% of it in a few days... However, now I'm just sick of it, and out of energy. This is how I am at all my jobs, and now even with a personal project... Life sucks.
I am currently trying to install Windows Server 2012 on my server. Whenever I boot to the USB stick which has the ISO it gives me the
"0xc000000e"
and
"The Boot Configuration Data" for your PC is missing or contains errors."
I have used the Windows ISO to USB program twice to get thi...
@LucasKauffman the only real advantage is that we use OEL (Oracle's RHEL) at work exclusively - so when I want to do something at home that's neither OSX or Windows I pick an RHEL variant so it's the same - that's the only thing I care about
@LucasKauffman for low volume stuff then yeah - we currently use 4 x DL980's with dual FusionIO 10.2TB drives in them but we're moving to 96 x BL460's with a 10 x 900GB R10 and 2 x 800GB SSD's in SmartCache in front setup
Thank you for your answer. Of course I can reach the gateway on the same subnet. The setup is, that servers on the same subnet can only communicate with each other via the subnets gateway. — Bannane2 hours ago
Why does nobody understand how IP subnetting works?!
Endurance International Group, Inc. (EIG), formerly BizLand, is one of the world's largest website hosting companies.
The company was founded in 1996 and is headquartered in Burlington, Massachusetts, It achieved its size by acquiring a large number of smaller hosts, which it continues to operate under the original names.
In 2011, Endurance was bought from Accel-KKR by Warburg Pincus and GS Capital Partners, for around $975 million,.
List of hosting brands
* 2slick.com
* AccountSupport
* A Small Orange
* ApolloHosting
* Berry Information Systems L.L.C.
* BizLand
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@Cole Don't let your manager see this, but the question of whether indexing pre-2008 could be introduced alone, inspired me to launch a blog and put together a disorganized mess of powershell stuff: blog.iisreset.me/2013/09/…
If you have an IP address on a subnet, which is what I assume you mean by local network, you will also have a route for it, intrinsically, because you have an interface on it. You can't direct all traffic to that network through a gateway because the gateway would be on that subnet too, and you ...
Nothing.
It's Linux, and that's how it works.
It'll use "free" memory for disk caching, because what's the point in having an under-utilised resource?
When a process wants more memory, it'll ask for it from the kernel, and (generally), get it.
@TomO'Connor I'm leaning toward unclear what you're asking. He seems to be asking why MySQL is using memory, but I'm not really sure since he didn't provide any data about it.
I can make this change now. However, are you sure you need the additional RAM? 8GB is used, but 5GB of it is in cache. Is the application experiencing a problem at the moment?
Is there any DATA to support XEON being more reliable, or is XEON just a brand name, and i7 another brand name, for members of an identical CPU family from Intel, offered at different price points? For example, is the multi-core feature just a matter of unlocking a chipset feature, or is there actual silicon gates involved in enabling multi-core? Are the multi-core and ECC DRAM features on the die of the i7 and just not connected to the relevant pins in the LGA 2011 socket? — Warren P2 hours ago
oh, Super User. You retarded subset of the technology universe.
Summary
Risks of using LVM:
Vulnerable to write caching in kernel and hard drive/SSD on kernels before 2.6.33, or in VM guests
Harder to recover data due to more complex on-disk structures
Harder to resize filesystems correctly
Snapshots are hard to use, slow and buggy
Requires some skill to c...
@ewwhite Really? Google it? Halfway through a process and he didn't even bother to document anything about what he was doing? WTF is wrong with that company?
Geezus I'm about to get yelled at soon; my boss asked me "How do you screenshot on a Mac?" I replied "I dunno - try Control+Shift+Google" and I heard him repeat that to a customer verbatim
Looking at the image below, taken from the book of Ilya Grigorik - High Performance Browser Networking, I can understand that the SYN packet picks a random sequence number which is incremented in SYN ACK packet (N+1). Finally, in the ACK packet both sequence (N+1) and acknowledge (N+1) numbers a...
It appears that Google trusts mail arriving from Hotmail more than it trusts mail arriving from some random server on the Internet. This is completely out of your control.
One thing that is in your control is:
X-Mailer: PHPMailer 5.2.7 (https://github.com/PHPMailer/PHPMailer/)
Considering how...
but it's come to light that it is totally unauditable (which is not true; I am currently working on an extremely time-consuming way to audit it similar in working to memtest86+)
@MichaelHampton Mine neither, but that's what you do
I am not kidding about this: I have some friends who, when we need to talk about certain things, take all our electronics, remove batteries, and put them in another room
I am currently trying to install Windows Server 2012 on my server. Whenever I boot to the USB stick which has the ISO it gives me the
"0xc000000e"
and
"The Boot Configuration Data" for your PC is missing or contains errors."
I have used the Windows ISO to USB program twice to get thi...
I need to expand a random name with a choosen domain. Example: nslookup abc 127.0.0.1 -> should look for abc@domainchoosen.dom.
Suggestions?
Nothing.
It's Linux, and that's how it works.
It'll use "free" memory for disk caching, because what's the point in having an under-utilised resource?
When a process wants more memory, it'll ask for it from the kernel, and (generally), get it.
It appears that Google trusts mail arriving from Hotmail more than it trusts mail arriving from some random server on the Internet. This is completely out of your control.
One thing that is in your control is:
X-Mailer: PHPMailer 5.2.7 (https://github.com/PHPMailer/PHPMailer/)
Considering how...
