Re: [SLUG] RAID and LVM
Hi, On Thu, Feb 18, 2010 at 3:18 PM, Nigel Allen wrote: > I want to set up a pair of 1 TB drives on an HP DL145 G3 and I'm looking for > suggestions as to the best way to partition them. > > Would I be best using software RAID and LVM? Given that it's a fairly busy > machine (mail server for 40+ users) I'd like to achieve: > > 1) Speed How much speed do you really need for a email server? For 40-100 users 2x SATA drives in software raid 1 should be sufficient. > 2) Reliability Sure software raid 1 will give you that. Make sure you install grub on both drives so you can boot off either in case one dies. Also make sure you monitor for failures. > 3) Ease of maintenance. Document the setup. And keep the docs current. > Anyone care to take a punt at a layout? This really depends on your requirement for how much email you want to store on the system, duration of logs etc. Will the system be doing anything else? If so the layout might change. I would personally use something along the lines of the following. /boot (md0 100mb) Create another raid 1 array md1 & fully allocate this to a PV. I usually call the PV the hostname of the machine. So if I need to access the disk/s from another system I know which system the disk is from. / - LV called root 3-4GB /var/spool/mail - LV called mailspool 1-5 GB (I am assuming I would be storing mail elsewhere such as /home/user/Maildir) /var/log - LV called logs, 5 GB to start with. I'd also have mail logs compressed and rotated daily. Archive as long as you need too. /home - LV called home, 50GB to what ever you deem required for user email storage needs. I'd have users storing mail in their home directories so they can use IMAP and leave mail on the server. If I was doing anything with a database, I would have a dedicated LV for /var/lib/mysql or /var/lib/pgsql. This would allow me to snapshot those volumes for backups etc. Hope this gives you some ideas. -- Paul -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] RAID and LVM
> "Dean" == Dean Hamstead writes: Dean> Regardless of the method used, with two drives you either get Dean> speed or reliability, you dont get both. Dean> You either mirror (reliability) or stripe (speed). Actually, mirroring should improve speed for reads, because you can read from the discs in parallel at different locations. Write speed will be slower though. This assumes decent controllers and tagged scsi queueing, though. Mind you for a high performance system I'd be wanting to use more and smaller faster drivers. -- Dr Peter Chubb peter DOT chubb AT nicta.com.au http://www.ertos.nicta.com.au ERTOS within National ICT Australia All things shall perish from under the sky/Music alone shall live, never to die -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] RAID and LVM
> "Nigel" == Nigel Allen writes: Nigel> Greetings Nigel> I want to set up a pair of 1 TB drives on an HP DL145 G3 and Nigel> I'm looking for suggestions as to the best way to partition Nigel> them. How much space do you need? For reliability and performance, straight mirroring is a good bet. -- Dr Peter Chubb peter DOT chubb AT nicta.com.au http://www.ertos.nicta.com.au ERTOS within National ICT Australia All things shall perish from under the sky/Music alone shall live, never to die -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] RAID and LVM
Regardless of the method used, with two drives you either get speed or reliability, you dont get both. You either mirror (reliability) or stripe (speed). Dean Nigel Allen wrote: Greetings I want to set up a pair of 1 TB drives on an HP DL145 G3 and I'm looking for suggestions as to the best way to partition them. Would I be best using software RAID and LVM? Given that it's a fairly busy machine (mail server for 40+ users) I'd like to achieve: 1) Speed 2) Reliability 3) Ease of maintenance. Anyone care to take a punt at a layout? TIA Nigel. -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
[SLUG] RAID and LVM
Greetings I want to set up a pair of 1 TB drives on an HP DL145 G3 and I'm looking for suggestions as to the best way to partition them. Would I be best using software RAID and LVM? Given that it's a fairly busy machine (mail server for 40+ users) I'd like to achieve: 1) Speed 2) Reliability 3) Ease of maintenance. Anyone care to take a punt at a layout? TIA Nigel. -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Adjusting volume on bluetooth headset
> "Luke" == Luke Yelavich writes: Luke> On Thu, Feb 18, 2010 at 10:10:11AM EST, Ken Foskey wrote: >> On Thu, 2010-02-18 at 09:54 +1100, Luke Yelavich wrote: >> >> > Thats because ALSA bluetooth support is via an alsa plugin >> provided by > the bluez package, as all audio goes via the bluez >> stack. >> >> This question springs to mind. Is there a bluez management tool? Luke> There is a GNOME bluetooth applet that allows you to pair Luke> devices, send files, etc. Probably something for KDE as well, Luke> but I don't know what its called. Setting up without all that stuff is really painful. Bluez relies heavily on dbus, which although it has shell and python tools for manipulation, they are verbose and hard to type. Peter C -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Adjusting volume on bluetooth headset
On Thu, Feb 18, 2010 at 10:10:11AM EST, Ken Foskey wrote: > On Thu, 2010-02-18 at 09:54 +1100, Luke Yelavich wrote: > > > Thats because ALSA bluetooth support is via an alsa plugin provided by > > the bluez package, as all audio goes via the bluez stack. > > This question springs to mind. Is there a bluez management tool? There is a GNOME bluetooth applet that allows you to pair devices, send files, etc. Probably something for KDE as well, but I don't know what its called. Luke -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Adjusting volume on bluetooth headset
> "Luke" == Luke Yelavich writes: Luke> On Wed, Feb 17, 2010 at 04:52:12PM EST, Peter Chubb wrote: >> Hi folks, I've recently acquired a bluetooth headset capable of >> a2dp streaming. After a lot of mucking around I've managed to get >> it sort-of working with mplayer. But I can't wwork out how to >> adjust the volume. >> >> I do mplayer -ao alsa:device=bluetooth file.ogg and I get sound >> from the headset. But alsamixer doesn't see the mixer, and it's >> too loud. Mplayer's volume control says it has changed the volume, >> but it doesn't seem to make a difference --- even when mplayer >> reports 0% there's still lots of volume. Luke> Probably the ALSA interface to bluetooth is not working very Luke> well. What alsa-lib and bluez versions are you using? Latest from Debian unstable: bluez 4.60-1 libasound2 1.0.22-1 -- Dr Peter Chubbwww.nicta.com.au peter DOT chubb AT nicta.com.au http://www.ertos.nicta.com.au ERTOS within National ICT Australia From Imagination to Impact Imagining the (ICT) Future -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Adjusting volume on bluetooth headset
On Thu, 2010-02-18 at 09:54 +1100, Luke Yelavich wrote: > Thats because ALSA bluetooth support is via an alsa plugin provided by > the bluez package, as all audio goes via the bluez stack. This question springs to mind. Is there a bluez management tool? (I don't have bluetooth...) -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Adjusting volume on bluetooth headset
On Wed, Feb 17, 2010 at 04:52:12PM EST, Peter Chubb wrote: > Hi folks, >I've recently acquired a bluetooth headset capable of a2dp >streaming. After a lot of mucking around I've managed to get it >sort-of working with mplayer. But I can't wwork out how to adjust >the volume. > >I do > mplayer -ao alsa:device=bluetooth file.ogg >and I get sound from the headset. But alsamixer doesn't see the >mixer, and it's too loud. Mplayer's volume control says it has >changed the volume, but it doesn't seem to make a difference --- >even when mplayer reports 0% there's still lots of volume. Probably the ALSA interface to bluetooth is not working very well. What alsa-lib and bluez versions are you using? >And >cat /proc/asound/devices > shows only the on-board Intel sound card, not bluetooth. Thats because ALSA bluetooth support is via an alsa plugin provided by the bluez package, as all audio goes via the bluez stack. Luke -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
Re: [SLUG] Mailing list web archives..... Is this leagal ?
On Wednesday 17 February 2010 11:09:16 Andrew Cowie wrote: > gmane archives on request of the list owner, which, while not explicit > consent on the part of the originator, is at least a relationship with > the mailing list... > > Given how long public mailing lists have been around, and given how long > public web archives of them have been available, it'd be rather hard to > construct an argument that someone _posting_ to a public list should > have an expectation that no one would be able to see their content. These are relevant considerations, but not conclusive. As you will have seen by now another lawyer has counselled caution on this. On Wednesday 17 February 2010 11:46:31 david wrote: > It's a horror story awaiting a litigant with deep pockets. > > Is there any case law? I'm not aware of any off the top of my head. The circumstances where it would be worthwhile to a plaintiff to bring an action over something like this may not be frequent, so if anybody does take it to a lawyer they might be encouraged to let it go. However there are some people with the money and will to spend $100K or more in legal fees to make a point even though they might only get a handful of dollars if they win (and even though they might lose), so the risk is still there. Some people don't mind taking risks and don't care how large the risk they are taking is. In other cases, seek proper, considered, legal advice (and don't rely on anything you see written on a mailing list, even if two independent lawyers seem to be in agreement to any extent). -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
[SLUG] Problems with DVD creation
Hi all, I'm quite stuck and would really appreciate some advice/assistance/ideas. My apologies for the long post but I'm trying to be clear about what's happening and trying to solve it without wasting people's time. I'm having a weird experience with DVD creation and playing. Presently using Kubuntu Karmic 9.10. All the hardware is the same as prior to upgrading from 8.04. I installed 9.10 about four months ago. I made several DVDs last year which still work on my home DVD player. They also work on my desktop and our crappy in-car DVD player. However, none of the DVDs I have made today will work on our home DVD player nor will they work on our in-car DVD player. By not working, I mean that I get the menu page up and can move to the different selections on that home page but when I select an option nothing happens - i.e. the DVD does not play the related video. I'm using DVD-Styler to construct the DVDs from videos I've made which is the same app I've used for a couple of years. All of the DVDs work on my desktop machine (which is the machine I use to burn the DVDs). I have just burnt a DVD from an ISO which I created last month and the DVD will not work on our home DVD player. We have one laptop with a built-in DVD player. A Hewlett-Packard. It has a small linux distro (called Quick Play) which operates at boot, separate from the main distro. You start it like a DVD player (the keyboard has separate keys for this function). Older disks I have made will work on this as will commercially produced DVDs we own. An .iso I just burnt (which had been created last month) works fine. I can select the menu options and the videos play. The newer disks I'm burning from iso made today out of new dvdstyler projects won't work. The newer ones show only the menu but won't kick on to the relevant videos. You can click the link, but...nada. On the weekend I burnt an .iso of Vector Linux and that seemed to work fine. I've now taken a DVD-Styler file I created last month (it saves the details as an .xml file so you can merely open the xml file with D'styler and make changes if you wish). I have left one of the original videos in the collection and changed one for a newer video created today. On my desktop and laptop with Quick Play it works fine. On the in-car DVD player I get the menu but the buttons (though highlighting when 'clicked') are not progressing to the videos. BUT get this: If I hit the key that looks like this on the DVD player and in-car DVD player >>| (forwards by scene??) and then hit the play button I get the first video in the queue and sometimes can >>| through to the second video() Is this something to do with how the internal framework of the DVD is working??? The DVD players are not reading the file which tells them where the files are Additional to all this, the blank DVDs are in a big stack. They are kept on the bottom shelf and not exposed to direct sunlight. However it has been getting rather warm over the last few days (as we all know). I've started taking disks from the bottom of the stack but this has made no difference (the stack is about 70 deep). Well, I'm stumped. Well and truly. Any help would be very gratefully and willingly accept...I'm too confused and tired now. Regards, Patrick -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
[SLUG] Need an Intel L440GX
Hey I know it's a long shot but I'm after an intel server motherboard L440GX if anyone has one they're willing to part with just let me know how much you want for it. cheers Kris -- SLUG - Sydney Linux User's Group Mailing List - http://slug.org.au/ Subscription info and FAQs: http://slug.org.au/faq/mailinglists.html
