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Comments:
<0> RedACE: yada yada yada
<0> chuckyp: there is an "expiration" setting ... do you know if this truely deletes the stuff from the server after the given time ?
<1> sybariten, dunno that much about it.
<0> ok
<2> hey guys
<2> anyone here use LVM?
<3> Nobody's ever used LVM
<2> i have a SAN with 4.7TB of storage; it is a dell powervault thing, should i make it one large parition, or make smaller 500GB and user LVM
<3> I'd go for LVM(2)
<2> its going to be used for storage of xray, mri, cat etc..
<3> With that much space, I'd probably feel best creating, like you said, maybe 500GB PVs, adding those into the one main VG, and going from there
<3> I think the LVM2 specs recommend making just one huge partition, but etc.
<3> I believe there's an #lvm2 or something
<2> sekhmet, thats how it is at the moment
<3> Which was pretty low-traffic last time I was there, but it was helpful
<3> Me, I'd feel better with chunks of 500G, that may not be really necessary though
<3> And, as always, it's generally a Good Thing to leave some space unallocated so you can grow your LVs more easily later on, as-needed
<2> sekhmet, the advantage of lvm is so u can resize partitioons...
<2> is that right?
<2> is it nec***ary
<2> do people feel comftable using it with that much space?
<3> sendro: That's what some people use it for, it's also useful for being able to aggregate many smaller disks into larger partitions, etc
<3> sendro: We use it for some multi-TB database stuff w/ Oracle I believe at work (though those are systems I don't actually do anything with)
<3> At least I think it's being used on those boxes
<2> sekhmet, yeah ok.
<2> so stick with LVM
<2> personally im not very comftable with it..
<3> sendro: http://www.tldp.org/HOWTO/LVM-HOWTO/whatisvolman.html
<2> also the san drivers are causing errors..
<2> sekhmet, have you got time to look at this log.
<3> If you don't trust some of the disks behind the PVs, I'd be a bit leery of commiting them into a larger pool
<3> From what I understand, I don't think LVM2 responds very well to having a PV drop out
<2> sekhmet, what do you mean PV?
<3> sendro: http://www.tldp.org/HOWTO/LVM-HOWTO/anatomy.html
<3> sendro: That HOWTO in general is a good though to know
<2> yeah it dosnt show examples..
<2> sekhmet, sorry
<2> sekhmet, this is the exact doc i used to set it up initially
<2> i havent read it all though
<3> np
<2> it is set up, but im not happy with it; but i guess that relates to the SAN software
<3> It'd certainly help to isolate your problem a bit more
<3> If you're in charge of the array and you're not comfortable with LVM, then, you know, it's best to go with what you're comfortable with
<2> sekhmet, these are the errors that i am getting
<2> i have a SAN with 4.7TB of storage; it is a dell powervault thing, should i make it one large parition, or make smaller 500GB and user LVM
<2> damn
<2> sorry
<4> sendro : depends on what you're going to do with it.
<4> and using lvm on top of it would be still good, no matter how you 'partition' it
<2> Feb 21 16:54:57 ehpnfs01 kernel: end_request: I/O error, dev sdo, sector 0
<2> Feb 21 16:54:57 ehpnfs01 kernel: Buffer I/O error on device sdo, logical block 0Feb 21 16:54:57 ehpnfs01 kernel: Device sdo not ready.
<2> Feb 21 16:54:57 ehpnfs01 kernel: end_request: I/O error, dev sdo, sector 1048575872
<2> Feb 21 16:54:57 ehpnfs01 kernel: Device sdo not ready.
<2> Feb 21 16:54:57 ehpnfs01 kernel: end_request: I/O error, dev sdo, sector 0
<2> Feb 21 16:54:57 ehpnfs01 kernel: Device sdp not ready.
<2> Feb 21 16:54:57 ehpnfs01 kernel: end_request: I/O error, dev sdp, sector 0
<2> Feb 21 16:54:58 ehpnfs01 kernel: Buffer I/O error on device sdp, logical block 0Feb 21 16:54:58 ehpnfs01 kernel: Buffer I/O error on device sdp, logical block 1
<2> these errors happen after i installed the san software
<3> sendro: generally you should use a pastebin for multiline logs like that
<2> sekhmet, i know, sorry
<3> sendro: That looks like hardware issues for me, likely the SAN stuff
<4> looks the same as the SAN i was today trashing with iozone :)
<2> sekhmet, yeah it makes a link once the driver is installed from /dev/sdb etc... /dev/emcpowera1 etc.
<2> so i added the /dev/emcpowera1 "b1" "c1" etc to the volgroup
<3> Personally I'm a big fan of LVM, though I'm wary of mixing up drives of various ages, etc. For my home use I tend not to have drives that I trust at the same levels
<3> I don't think LVM's your problem here though
<2> then i listed the the vol group and drives partiions /dev/empowera1, b1, were there however it made a link back to /dev/sd* for the rest
<2> sekhmet, im just wondering if its safe to store data on yet.
<4> no, it's not lvm. it's the driver issue, the media, or the san device itself
<3> sendro: Look at your kernel errors and ask yourself if you think it's safe. :)
<2> sekhmet, also this is how i formated the vol group mkfs.ext3 /dev/volgroup/vol01
<2> sekhmet, yeah,
<2> sekhmet, so no good to store data then?
<2> i have to let these guys know
<2> they know im not happy with it.
<3> sendro: Er, well, I'm not exactly an authoritative source on the reliability of your hardware
<2> sekhmet, its not the hardware, its the best stuff - using a dell blade
<3> sendro: It sounds like you're in charge of the systems this data's supposed to live on, so it seems to me like you've got to figure out what's going on here before you'd want people putting important things on your drives
<2> also the san is brand new. its the software
<4> uhmm, what kind of HBA do you have?
<3> sendro: Just because something's new doesn't mean it can't have problems. Go through and eliminate possible causes and you'll eventually come to the one that's causing the problems, be it hardware or software
<2> HBA?
<4> host bus adapter. the card that goes into the machine, on the pci/whatever slot, which then connects you to the san
<4> SiegeX, 1a:01.0 SCSI storage controller: QLogic Corp. QLA2200 64-bit Fibre Channel Adapter (rev 05)
<5> if /boot is just a dir off of / that is mounted on /dev/md0 (raid volume), should I be able to install grub to /dev/hda and have it get to /boot/vmlinux ?
<2> sekhmet, thanks for that, i just let them know/
<4> sendro : well, what's the answer?
<2> ananke, im not sure on that, its built into the dell blade i think
<2> EMC or "dell" provided the software for it.
<2> however the manual was written for rhe3 not 4
<4> sendro : well, check lspci
<2> ananke, i dont have access to it right now,
<2> ananke, thanks.
<4> good luck. you can always check a different OS, or use a different HBA, and see if you can get it to work
<2> ananke, its a dell blade server (10 nodes) i am using on of them
<2> all fibre san
<2> so i cant change the san card; this config is all certified; dell provded rhe4
<2> i guess i can try compiling the software and not using rpm
<4> well, did it ever work before, did you actually get to see those drives? /dev/sdo, /dev/sdp ?
<2> ananke, no, not without the san software installed.
<2> ananke, i can see the devices /dev/sdo is linked to /dev/emcpowero
<4> well, i mean, were those devices functional to any point, or started to fail during data transfer?
<2> ananke, its all working, just get those errors at boot up.
<4> at bootup? before or after the drivers are loaded?
<2> at the same time
<2> ananke, i have the entire log..
<4> www.pastebin.com
<2> ananke, can i email you it?
<4> i'd prefer not
<4> anyway, i'm off to cook dinner
<2> ananke, ok.
<2> cheers
<6> When strace an application does it elevate the processes permissions. The reason I ask, is that a process will fail when not being monitored but if I strace it everythings succeeds fine
<1> Okay is there a way to have an internal computer browse to http://test and have it link to an internal server. But have the computer still have access to the outside world on other requests?
<1> Like routing for a specific name etc...
<5> chuckyp: yes
<5> chuckyp: easy way: http://192.168.1.177 - also easy: put foo in /etc/hosts and http://foo
<1> CarlFK, The internal computers are using my isp's DNS servers though
<5> chuckyp: so?
<5> "browse to http://test"; - what is test's IP?
<1> CarlFK, wouldn't the request be sent out to the DNS server first which is outside of my lan.
<5> not if test is in /etc/hosts
<1> oh okay you are saying /etc/hosts on the internal computers
<1> not on the server correct?
<5> right
<1> CarlFK, I'm looking for a way of doing it without modifying that on internal computers because some of them may be windows etc... different clients
<5> setup a dns on your LAN
<5> or access them by IP
<5> chuckyp: easy way: http://192.168.1.177
<1> what about advanced routing with the router.
<1> CarlFK, I know about using the ip address but the point of doing this is to not have ot give out the ip address becomes annoying giving internal users the ip rather than just saying browse to test.
<5> something has to translate "test" to an IP. that will either be a dns server or a hosts file - I can't think of anything else
<5> you might be able to get your current DNS to include private IP's - not sure the DNS admin (your ISP) is gonna like that
<1> CarlFK, I'm just wondering if there is a way to send a hosts file to a machine when it connects via dhcp.
<5> nope
<5> I have been doing a bit with dhcp lately, and that isn't even close
<1> gotcha
<5> sounds like you want to use a local dns server
<1> Yeah I was just trying to avoid that.
<1> or a redirect via proxy or firewall maybe?
<1> Wonder if it would have that capability.
<5> something has to translate "test" to an IP. that will either be a dns server or a hosts file - I can't think of anything else
<1> CarlFK, What i'm thinking of is a proxy that all traffic would be routed through then if a the url test was caught it would redirect to the ip. Just like a blocked site etc...
<5> but untill "test" gets an IP, I don't think there will be any trafic
<1> Gotcha
<1> ahh well dns is the way to go then.
<5> but..
<5> there is some dns entry that makes "anything".domain.com resolve to some given IP
<5> then test.somedomain.com and foo.somedomain.com woudl all get the same IP, and that box might be able to redirect based on the ... URL
<5> getting fuzzy on how well that would work
<1> CarlFK, So needless to say I have to set up a local DNS server. to only catch test. and link it to the local ip. All other traffic would get thrown out to the net.
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