Hey All,

I have a pool of XenServer 6.5 hosts that share a FC SAN (an inherited configuration that will change when we upgrade, and for those of you who've read past posts of mine YES the hosts in question are the blades...please hold the lecture I know this is all bad ). Somehow some of the LUNs on said SAN (3PAR 7200) were exported multiple times which inflated the number of actual paths available. I went ahead and cleaned these up, however now XenCenter is complaining about failed paths. Rightfully so, as the number of paths Xen is expecting has decreased.

Does anyone know how to have Xen reset the path count for a given SR? There was an out-of-the-box script that was supposed to do this (/opt/xensource/sm/mpathcount.py), but apparently does not work under XS 6.5. due to changes in how it handles multipathing (I believe it now uses dm-multipath exclusively). I posted on the official Citrix forum, but did not get a whole lot of help there. I'm hoping someone here may have suggestions on things to try.

Thanks!!

@DustinB3403 said:

@anthonyh said:

@DustinB3403 Thanks for the info. Like I mentioned originally, blades are not my first choice when it comes to server hardware. I'm just dealing with what I was dealt, and so far it hasn't been bad.

In any rate, my post was not looking for approval of my hardware, but a question about a BIOS setting. As much as I'd love to contiue this debate as I'm honestly and genuinely curious, I suspect my thread has officially been derailed...

Anybody have any input on my OP?

Sorry I wasn't looking to debate, just inform. As for the OP, I wouldn't enable this feature unless you are certain you need it. It appears to be designed for custom OS's including Red Hat, Suse and Microsoft Windows HPC Server.

http://www8.hp.com/h20195/v2/GetPDF.aspx/c04128168.pdf (Page 10)

So I wouldn't enable this feature.

Aha! Thanks!! I swear I did attempt some reasearch before posting. I'll leave it disabled, then.

@DustinB3403 Thanks for the info. Like I mentioned originally, blades are not my first choice when it comes to server hardware. I'm just dealing with what I was dealt, and so far it hasn't been bad.

In any rate, my post was not looking for approval of my hardware, but a question about a BIOS setting. As much as I'd love to contiue this debate as I'm honestly and genuinely curious, I suspect my thread has officially been derailed...

Anybody have any input on my OP?

@DustinB3403 What is a single point of failure on the chassis?

We're running the HP C7001 chassis. Everything is redundant as far as I can tell. Redundant management controllers, redundant Virtual Connect modules (which provides network and Fibre Channel connectivity). I don't know how the backplane was designed on the chassis we're using, so I wonder if it's a single board or if it's separate boards per X bays...or separate per bay, I'm not sure.

Yes, upgrading will be fun...but I don't see how it's any different specific to XenServer in general. You can't really mix vastly different hardware in a XenServer cluster anyway...so if you're doing a significant upgrade you'll have to do it to the entire cluster anyway.

I guess I should've been clear in that these are being used in a XenServer cluster.

@Jason It was a decision made before my time here. I inherited the setup and am supporting it. I would not have went with blades, but the setup so far has been pretty solid in the ~2 years I've been supporting it. shrug

Although blades would not have been my first choice if I had been the one building the cluster from the beginning, I am curious why you say they have more points of failure than a cluster of 1 U servers?

I'm configuring some new blades (HP ProLiant BL465c G8's) and am going through the BIOS to make sure that things are set so I get maximum performance. One of the settings I've come across is "HPC Optimization Mode". HP's help blurb about this setting is as follows:

"This mode is specifically deisnged for customers deploying servers in a High Performance Computing environment. When this mode is enabled, the performance of the processor can be maintained at a high level even if the processor temporarily exceeds the normal power threshold."

Is this something XenServer would benefit from?

@RojoLoco Our might be similar. We subscribed for HIS development so we could interface with the mainframes that other agencies still run (yuck). Though maybe we'll get lucky. It looks like SQL 2005 is ~$100 on eBay at a quick glance. I'm not sure my boss will want to put $1 into this old DB, but we'll see!

@RojoLoco I was just thinking that. We do have a subscription. I'll have to ask my boss when he's in later this morning.

Hey All,

I have an ANCIENT application running a SQL 7 database that, unfortunately, we'll need to hang on to until folks are absolutely sure data has converted over properly in the new system we implemented in October. Because it's a huge database, this task will take quite a while...we're thinking a least a year.

I would be a lot more comfortable keeping this application if I could get away from SQL 7 (which is running on a Win 2K box, by the way). I've been researching how to upgrade the DB and it looks like I can go from SQL 7 to SQL 2005, then from SQL 2005 to SQL 2012 (which is what we're running our current DBs on).

OF course, the app could use some commands structured for SQL 7 syntax that does not work in newer versions of MSSQL, but I'd at least like to give it a try.

So, with that said, does anyone have any recommendations on where I could possibly obtain a "trial" version of SQL 2005?

Thanks!

I think I've got it close enough!

find /this/directory -type f -printf "%f\t" -printf "%h\t" -printf "%TY-%Tm-%Td %TH:%TM\n"

Result:

101581_PR78450.pdf /this/directory/data/EFile/MO 2007-10-30 11:16

Ooh, I'm very close!

find /this/directory -type f -printf "%f\t" -printf "%h\t" -printf "%Tc\n"

Gets me this:

254405_FS85691.pdf /this/directory/data/EFile/CASEDOC Mon 27 Aug 2012 08:52:15 AM PDT

If I can get the timestamp formatted as YYY-MM-DDD HH:MM:SS (24h time) I will be golden! I don't care about PDT vs PST.

@scottalanmiller said:

@anthonyh said:

@scottalanmiller said:

I'm not clear what you are asking. Do you want a list of ALL files under said /directory or are you looking for only certain ones?

Every single file under /this/directory.

Oh okay.

find /dir -type f -print

Where /dir is the directory name in question. See if that gives you want you want.

That gives me the absolute path, but no date. I found this command that gets me a little closer:

find /this/directory -type f -exec stat -c "%n %y" {} ;

Gives me this:

/this/directory/data/EFile/DOC/227349_FS86478.pdf 2011-08-19 10:21:22.000000000 -0700

But it's not ideal, yet. I'd need to delimit the file and timestamp with something other than a space. I would love to eliminate the decimal on the seconds as well as the timezone, but I can work around those.

@scottalanmiller said:

I'm not clear what you are asking. Do you want a list of ALL files under said /directory or are you looking for only certain ones?

Every single file under /this/directory.

@scottalanmiller said:

No need to get the filename, the absolute path will include that already.

I want the file name and path to said file separate, but I suppose I could separate them through another step. I'm going to be matching by file name. basically table1.filename = table2.filename

I am working on document cleanup in an ancient custom (shitty) application we are trying to retire. Basically, there are files everywhere, and I need to find the files that are referenced in the database in the filesystem. My plan is to dump the file references from the application's database into a table, and do the same for the filesystem in another table. I will then match by filename and go from there.

However, I'm not sure how to approach capturing the files at the filesystem level. Say said files are structured in /this/directory, what would be the best way to capture the following data?

Filename | Absolute Path | Modified Date

Any advice would be appreciated. For what it's worth, this is on CentOS 7.

Thanks!!

I'm cleaning up the firewall at one of our datacenters, and I'm finding multiple instances of ACLs similar to the following:

access-list RTSP extended deny tcp any4 any4 eq rtsp
access-list RTSP extended deny tcp any4 host 67.113.51.34 eq rtsp
access-list RTSP extended deny tcp host 67.113.51.34 eq rtsp any4
access-list RTSP extended permit tcp any4 any4 eq rtsp
access-list RTSP extended permit tcp any4 eq rtsp any4

This is a Cisco ASA 5510. I am not, by any means, an ASA expert, but if my knowledge about ACLs is correct...the first statement in that ACL makes the remaining statements superfluous. Am I wrong?

Just set up Zen Load Balancer to load balance RDP sessions between three Win 2008 R2 VMs (6 sessions total). Set up a TCP farm, set each back-end to a max of 2 connections, and it works BEAUTIFULLY!

@scottalanmiller said:

My Windows 10 experience is that the Start Button and the Task Manager routinely do not work. I'm currently power cycling easily six to ten times a day because the Task Manager loses the ability to get control of the desktop and cannot show itself in order to kill things.

The degree to which Windows 10 lags behind late 1990s Linux desktops in stability is crazy. I've yet to have a Linux desktop lose control so dramatically that you can't get to a command line and kill the process causing the issue. In Windows 10, I expect in several times a day!

My Win 10 experience has been pretty good up until this morning. I had remoted in and was using my Win 10 box from home last night around 10pm without any issues. I came in this morning and every app I had left open was angry (XenCenter, Adobe Reader [a one page PDF], MS SQL Management Studio, and Chrome), and Windows was complaining about being out of memory (I thought that's what the pagefile was for?).

It wasn't happy until a reboot. It kept insisting on closing Windows Explorer to free up memory. Was very interesting.

We'll see if it happens again. In the moment, I didn't think to check Task Manager to see how much memory it reported was being used, and by what. Next time I'll do that...if it'll let me. The machine in question is a new Dell OptiPlex 3020 with 8 GB RAM.

@dafyre said:

@anthonyh said:

@brianlittlejohn I've been running Mint at work on my primary desktop and laptop for about a year now. I'm also running it on my desktop at home (not sure how long). I haven't looked back since!

I find I have to keep switching back to windows... . Stupid Games, lol.

That's what dual-booting is for!

Fortunately (or unfortunately depending how you look at it) I'm not a big gamer, so I have no need for Windows at home. My wife's computer is running Win7 though (I've tried to convince her to give Mint a try, but she just won't budge!) so if I really needed it for something it's there. I also have a MacBook Pro running OS X as well. At work I do have a Windows box for those Windows only things (like XenCenter) too. I've considered just running a VM on my Mint box, but I do like that I can bounce between the two if I'm doing OS updates or whatnot.

@brianlittlejohn I've been running Mint at work on my primary desktop and laptop for about a year now. I'm also running it on my desktop at home (not sure how long). I haven't looked back since!