- luv-main - luv.asn.au

Re: mysqld_safe seems unsafe
by Arjen Lentz 13 Nov '13

13 Nov '13

Some settings such as ulimit -n (open-files-limit) cannot be done from inside the daemon. Most other daemons fork themselves so the same mechanism for restarting is built in anyway. A signal 11 is always a bug, not normal or acceptable. So I trust you reported the backtraces from the errorlog? Regards, Arjen. -------- Original message -------- From: Russell Coker <russell(a)coker.com.au> Date: 08/11/2013 17:07 (GMT+10:00) To: luv-main(a)luv.asn.au Subject: mysqld_safe seems unsafe It's always a sign of low code quality when a daemon has a wrapper script to restart it when it crashes. Squid used to have such a script but for many years has been considered to be reliable enough not to need it. MySQL seems to be the only commonly used daemon with such a script. I had been wondering if the script was even needed, I would have hoped that mysqld was reliable many years ago. But I checked the logs of a RHEL4 system I run and found 19 log messages about mysqld getting signal 11 since 2006 of which the last one was 4 days ago. One problem with such scripts seems to be the issue of reliably shutting down the server. I have a ZFS system that doesn't always mount the filesystems on boot so I use /etc/rc.local to restart mysqld. That usually works apart from the time when I ended up with two copies of mysqld running at once. However mysqld uses file locking and it seems that you don't get data loss when you have two copies of it running at the same time (try not to test this theory on production networks). While it was handy that mysqld was restarted 19 times, it wasn't good that I was unaware of the problems. Is that script being used in the MySQL successors such as Drizzle? -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/ _______________________________________________ luv-main mailing list luv-main(a)luv.asn.au http://lists.luv.asn.au/listinfo/luv-main

3 3

Fwd: [Linux-aus] Linux Australia Travel Grants
by Bianca Gibson 13 Nov '13

13 Nov '13

"Linux Australia and linux.conf.au 2014 are pleased to announce the 2014 travel grants programme. linux.conf.au strives to be a conference that is open and accessible to the whole open source community. We realise however that, no matter how we arrange the pricing for the conference, it will still be unaffordable for some members of the community. These grants aim to reduce the financial barriers to attending linux.conf.au2014, by subsidising the registration and travel costs of contributors to the community who would otherwise have difficulty affording the cost of attending the conference. Please go to http://travelgrants.linux.org.au/ to read more and/or put in an application. Applications are due by 15 November, and winners will be informed by 1 December. LCA Travel Grants Organisers Michael Still and Kylie Willison"

1 1

A bash question
by Allan Duncan 12 Nov '13

12 Nov '13

I want to check for the existence of a file that can have a variable tail portion of its name. if[-f <file> ] doesn't seem to have the ability to do wild cards. Can anyone suggest how to achieve this? TIA.

4 6

App development software
by Bob 12 Nov '13

12 Nov '13

Hello again, In searching for Iphone and Android app development software I have come across this open source solution http://www.tersus.com/ Has anyone on the list had any experience with this? Thanks Bob

1 0

Fwd: [Linux-aus] Three days left: Nominate a community contributor for the 2014 Rusty Wrench
by Bianca Gibson 12 Nov '13

12 Nov '13

---------- Forwarded message ---------- From: Mary Gardiner <mary(a)puzzling.org> Nominations for the Linux Australia 2014 Rusty Wrench award are open for just THREE MORE DAYS! This year, thanks to Linux Australia Council, the Rusty Wrench winner will receive admission to linux.conf.au 2014 in Perth and travel costs from Australian or New Zealand locations. Who is giving to the Free and Open Source Software community? Creating it, making us stronger and representing our interests? This is your chance to acknowledge them at http://linux.org.au/vote/rusty-wrench-nomination-form. ** Timeline ** Nominations close THIS Friday November 15, 2013 Winner announced at linux.conf.conf.au 2014 (6th to 10th January) ** More information ** See http://linux.org.au/projects/awards for the history of the award and http://linux.org.au/rusty-wrench-selection-infomation for more information about what community contributions the Rusty Wrench award recognises! Make your nomination at http://linux.org.au/vote/rusty-wrench-nomination-form Existing 2014 nominations can be found at http://linux.org.au/vote/rusty-wrench-nomination-form/nominations/2014 We *encourage* duplicate nominations of the same people, because they can add more information. -Mary Gardiner (with Rusty Russell, Pia Waugh, Kimberlee Weatherall, Donna Benjamin) _______________________________________________ linux-aus mailing list linux-aus(a)lists.linux.org.au http://lists.linux.org.au/listinfo/linux-aus

1 0

OWOOT Melbourne picnic
by Bianca Gibson 11 Nov '13

11 Nov '13

Hi all, There is an Oceania Women Of Open Technology (OWOOT) picnic coming up in December. Partners and children welcome. ---------- Forwarded message ---------- Hi all, <snip> It's going to be at 1pm Saturday 14th of December at the western lawn in the botanic gardens. RSVP, dietary requirements and information in the following pad: http://piratepad.net/HsR3wzMLDH Cheers, Bianca

1 0

App development software
by Bob 11 Nov '13

11 Nov '13

Hello all, Is there any open source software available for app development similar to the Adobe Design Publishing Suite + addons or Mag+ ? I am looking for something for app development by someone with very limited coding experience. The options provided by Adobe plus addons are horribly expensive and I was was wondering if there is a viable open source alternative? Thanks Bob

2 1

App development software
by Bob 11 Nov '13

11 Nov '13

Hello all, Is there any open source software available for app development similar to the Adobe Design Publishing Suite + addons or Mag+ ? I am looking for something for app development by someone with very limited coding experience. The options provided by Adobe plus addons are horribly expensive and I was was wondering if there is a viable open source alternative? Thanks Bob

1 0

Thinking of Oracle Linux
by Russell Coker 11 Nov '13

11 Nov '13

The server which among other things holds my email runs Debian/Wheezy for the Dom0 and most DomUs. It's running Xen for virtualisation and ZFS for data storage. Currently I have some problems, the hardware is defective and has started spontaneously rebooting. This is really bad but a combination of ECC RAM and ZFS means that the risk of data loss is low, but uptime isn't good. The server needs to be replaced so now is a good time to consider other changes. ZFS is not well supported on Linux due to license issues. There are two aspects of this which are particularly important to me, one is that I've found ZFS to cause the kernel to OOM in situations where I think it shouldn't (EG a server with 4G of RAM doing a light Samba load). The other is that ZFS doesn't always start properly on boot so I need to hack the init scripts to make sure it's mounted before starting daemons that depend on it (which doesn't always work, see my message about MySQL). I believe that my coding skills are up to the task of making ZFS work as I desire. But no-one is going to pay me to do that and I don't feel inclined to waste hobby time on work that won't benefit the FOSS community. For reliable data storage on Linux the options are ZFS and BTRFS. The down- side of BTRFS is that it is new and most distributions don't support it as well as one wants for production code. But Oracle apparently support it well. Oracle are also really into Xen and should be able to give better MySQL support than anyone else. The options I'm considering at the moment are using Oracle Linux for the Dom0 and using Debian for the Dom0 with an Oracle kernel. Both of those should be good for running BTRFS and Xen. Debian with an Oracle kernel will make kernel upgrades a little painful but it means I don't have to change the rest of the OS configuration (I've run Debian systems with CentOS kernels before). A complete Oracle OS will work well together but it means I have to change everything to a different OS, admittedly that won't be so hard as the Dom0 does little other than managing DomUs and running MySQL. Any suggestions? -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

6 13

Linux on Dell servers
by Russell Coker 10 Nov '13

10 Nov '13

I was just looking at the options available on a Dell PowerEdge T110 which has a base price of $749 (it's a nice system, I just bought one for my home). A recent addition to the customisation page (which as far as I recall wasn't there last week when ordering my system) is a huge range of Red Hat and SUSE options. It's nice that Linux options are available, but it's a pity that they don't offer the cheap ones. The T110 makes a nice little workstation/server so one of the desktop licenses for RHEL might be a more useful option. It's rather surprising to see RHEL options going up to well over 20* the base hardware price and SUSE options going up to over 10* the base hardware price. Red Hat Enterprise Linux v6.4, x86_64, 1-2 Sockets, 1 Guest, 1 yr Red Hat Network, FI [add $1,393.70 or $23/week-1] Red Hat Enterprise Linux v6.4, x86_64, 1-2 Sockets, 1 Guest, 3 yr Red Hat Network, FI [add $3,971.00 or $50/week-1] Red Hat Enterprise Linux v6.4, x86_64, 1-2 Sockets, 1 Guest, 5 yr Red Hat Network, FI [add $6,618.70 or $77/week-1] Red Hat Enterprise Linux v6.4, x86_64, 1-2 Sockets, 4 Guest, 1 yr Red Hat Network, FI [add $2,091.10 or $30/week-1] Red Hat Enterprise Linux v6.4, x86_64, 1-2 Sockets, 4 Guest, 3 yr Red Hat Network, FI [add $5,958.70 or $70/week-1] Red Hat Enterprise Linux v6.4, x86_64, 1-2 Sockets, 4 Guest, 5 yr Red Hat Network, FI [add $9,930.80 or $111/week-1] Red Hat Enterprise Linux v6.4, x86_64, 1-2 Sockets, Unlimited Guest, 1 yr Red Hat Network, FI [add $3,485.90 or $45/week-1] Red Hat Enterprise Linux v6.4, x86_64, 1-2 Sockets, Unlimited Guest, 5 yr Red Hat Network, FI [add $16,556.10 or $179/week-1] SuSe Linux Enterprise 11 SP2,1-2SKT,1yr Support With Media(DIB),Physical [add $1,708.30 or $26/week-1] SuSe Linux Enterprise 11 SP2,1-2SKT,3yr Support With Media(DIB),Physical [add $4,495.70 or $55/week-1] SuSe Linux Enterprise 11 SP2,1-2SKT,5yr Support With Media(DIB),Physical [add $6,725.40 or $78/week-1] SuSe Linux Enterprise 11 SP2,1-2SKT,1yr Support With Media(DIB),Unlimited Virtual Licenses [add $2,153.80 or $31/week-1] SuSe Linux Enterprise 11 SP2,1-2SKT,3yr Support With Media(DIB),Unlimited Virtual Licenses [add $5,833.30 or $69/week-1] SuSe Linux Enterprise 11 SP2,1-2SKT,5yr Support With Media(DIB),Unlimited Virtual Licenses [add $8,620.70 or $98/week-1] SuSe Linux Enterprise Server 11 SP2,1-2SKT,1yr Support With Media(FI),Physical [add $1,708.30 or $26/week-1] SuSe Linux Enterprise Server 11 SP2,1-2SKT,3yr Support With Media(FI),Physical [add $4,495.70 or $55/week-1] SuSe Linux Enterprise Server 11 SP2,1-2SKT,5yr Support With Media(FI),Physical [add $6,725.40 or $78/week-1] SuSe Linux Enterprise Server 11 SP2,1-2SKT,1yr Support With Media(FI),Unlimited Virtual Licenses [add $2,153.80 or $31/week-1] SuSe Linux Enterprise Server 11 SP2,1-2SKT,3yr Support With Media(FI),Unlimited Virtual Licenses [add $5,833.30 or $69/week-1] SuSe Linux Enterprise Server 11 SP2,1-2SKT,5yr Support With Media(FI),Unlimited Virtual Licenses [add $8,620.70 or $98/week-1] Red Hat Virtualization (DIB) add $0.00 -- My Main Blog http://etbe.coker.com.au/ My Documents Blog http://doc.coker.com.au/

6 11