Re: [CentOS] distributed storage/home-made cloud recommendations

2012-02-05 Thread Laurent Wandrebeck
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Le 04/02/2012 18:39, Boris Epstein a écrit : >> > Hello Laurent, > > Thanks! Very useful info, I never even heard of MooseFS and it > sounds very nice. > > One question: what happens if you lose your master server in their > designation? Or is it

Re: [CentOS] configure network bridge listing bridged intefaces

2012-02-05 Thread Robert Spangler
On Saturday 04 February 2012 19:18, the following was written: > On 02/03/2012 11:56 PM, Robert Spangler wrote: > > On Friday 03 February 2012 09:10, the following was written: > >> On 02/03/2012 08:07 AM, Mihamina Rakotomandimby wrote: > >> > Hi all, > >> > > >> > Having a 4 NIC s

Re: [CentOS] distributed storage/home-made cloud recommendations

2012-02-05 Thread Phil Schaffner
Boris Epstein wrote on 02/04/2012 11:57 AM: > What is RAID0+1? Nested RAID. Paraphrasing http://en.wikipedia.org/wiki/RAID : For a RAID 0+1, drives are first combined into multiple level 0 RAIDs that are themselves treated as single drives to be combined into a single RAID 1. Phil _

Re: [CentOS] distributed storage/home-made cloud recommendations

2012-02-05 Thread Boris Epstein
On Sun, Feb 5, 2012 at 10:32 AM, Phil Schaffner wrote: > Boris Epstein wrote on 02/04/2012 11:57 AM: > > What is RAID0+1? > > Nested RAID. Paraphrasing http://en.wikipedia.org/wiki/RAID : > > For a RAID 0+1, drives are first combined into multiple level 0 RAIDs > that are themselves treated as s

Re: [CentOS] mysql won't start with service, but starts with mysqld_safe

2012-02-05 Thread Tait Clarridge
On Sat, 2012-02-04 at 17:15 -0700, Larry Martell wrote: > Just installed mysql on centos 6.2. When I try to start it with service I get: > > #service mysqld start > MySQL Daemon failed to start. > Starting mysqld: [FAILED] > > Nothing at all is written

Re: [CentOS] a cloud VM under CentOS

2012-02-05 Thread Jim Wildman
On Sat, 4 Feb 2012, Digimer wrote: > On 02/04/2012 06:15 PM, Boris Epstein wrote: >> Hello everyone, >> >> Does anyone know if it is possible to construct a cloud of sorts out of >> several CentOS machines so as to enable a VM (or several VM's) that would >> run on top of that cloud and have failo

Re: [CentOS] distributed storage/home-made cloud recommendations

2012-02-05 Thread Ljubomir Ljubojevic
On 02/05/2012 04:37 PM, Boris Epstein wrote: > On Sun, Feb 5, 2012 at 10:32 AM, Phil Schaffner> wrote: > >> Boris Epstein wrote on 02/04/2012 11:57 AM: >>> What is RAID0+1? >> >> Nested RAID. Paraphrasing http://en.wikipedia.org/wiki/RAID : >> >> For a RAID 0+1, drives are first combined into mult

Re: [CentOS] mysql won't start with service, but starts with mysqld_safe

2012-02-05 Thread Larry Martell
On Sun, Feb 5, 2012 at 10:31 AM, Tait Clarridge wrote: > > > On Sat, 2012-02-04 at 17:15 -0700, Larry Martell wrote: >> Just installed mysql on centos 6.2. When I try to start it with service I >> get: >> >> #service mysqld start >> MySQL Daemon failed to start. >> Starting mysqld:              

Re: [CentOS] configure network bridge listing bridged intefaces

2012-02-05 Thread Steve Clark
On 02/05/2012 10:17 AM, Robert Spangler wrote: > On Saturday 04 February 2012 19:18, the following was written: > >> On 02/03/2012 11:56 PM, Robert Spangler wrote: >> > On Friday 03 February 2012 09:10, the following was written: >> >>On 02/03/2012 08:07 AM, Mihamina Rakotomandimby wrote

Re: [CentOS] a cloud VM under CentOS

2012-02-05 Thread Boris Epstein
On Sun, Feb 5, 2012 at 1:25 PM, Jim Wildman wrote: > On Sat, 4 Feb 2012, Digimer wrote: > > > On 02/04/2012 06:15 PM, Boris Epstein wrote: > >> Hello everyone, > >> > >> Does anyone know if it is possible to construct a cloud of sorts out of > >> several CentOS machines so as to enable a VM (or s

Re: [CentOS] configure network bridge listing bridged intefaces

2012-02-05 Thread Gordon Messmer
On 02/03/2012 05:07 AM, Mihamina Rakotomandimby wrote: > Searching the web I only found about creating a file > /etc/sysconfig/network-scripts/ifcfg-br0, but did not find where to > explicitely list what ports will be bridged. > > Where is it configured? For reference: As far as I know, bridged n

Re: [CentOS] mysql won't start with service, but starts with mysqld_safe

2012-02-05 Thread Larry Martell
On Sun, Feb 5, 2012 at 11:58 AM, Larry Martell wrote: > On Sun, Feb 5, 2012 at 10:31 AM, Tait Clarridge wrote: >> >> >> On Sat, 2012-02-04 at 17:15 -0700, Larry Martell wrote: >>> Just installed mysql on centos 6.2. When I try to start it with service I >>> get: >>> >>> #service mysqld start >>>

Re: [CentOS] mysql won't start with service, but starts with mysqld_safe

2012-02-05 Thread John R Pierce
On 02/05/12 1:22 PM, Larry Martell wrote: > clone(child_stack=0, > > flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, > > child_tidptr=0xb7746b98) = 17017 wild guess says, its forking itself, and THAT process invokes /etc/init.d/mysqld -- john r pierceN 37,

Re: [CentOS] distributed storage/home-made cloud recommendations

2012-02-05 Thread Ross Walker
On Feb 5, 2012, at 10:32 AM, Phil Schaffner wrote: > Boris Epstein wrote on 02/04/2012 11:57 AM: >> What is RAID0+1? > > Nested RAID. Paraphrasing http://en.wikipedia.org/wiki/RAID : > > For a RAID 0+1, drives are first combined into multiple level 0 RAIDs > that are themselves treated as sin

Re: [CentOS] distributed storage/home-made cloud recommendations

2012-02-05 Thread Boris Epstein
On Sun, Feb 5, 2012 at 5:31 PM, Ross Walker wrote: > On Feb 5, 2012, at 10:32 AM, Phil Schaffner > wrote: > > > Boris Epstein wrote on 02/04/2012 11:57 AM: > >> What is RAID0+1? > > > > Nested RAID. Paraphrasing http://en.wikipedia.org/wiki/RAID : > > > > For a RAID 0+1, drives are first combin

Re: [CentOS] distributed storage/home-made cloud recommendations

2012-02-05 Thread John R Pierce
On 02/05/12 2:42 PM, Boris Epstein wrote: > What you are saying seems to make sense actually. I wonder how much a RAID6 > with a few spares would make sense. If we are talking a large number of > disks then RAID 6 + 2 spares means overpaying only for 5 disks. Not a lot > if the total number of them

Re: [CentOS] distributed storage/home-made cloud recommendations

2012-02-05 Thread Ross Walker
On Feb 5, 2012, at 5:42 PM, Boris Epstein wrote: > What you are saying seems to make sense actually. I wonder how much a RAID6 > with a few spares would make sense. If we are talking a large number of > disks then RAID 6 + 2 spares means overpaying only for 5 disks. Not a lot > if the total numbe

Re: [CentOS] distributed storage/home-made cloud recommendations

2012-02-05 Thread John R Pierce
On 02/05/12 3:24 PM, Ross Walker wrote: > It might be easier to do the striping in software cause that's a zero > over-head operation and it makes the hardware RAID easier to setup, maintain > and can make rebuilds less painful depending on the controller. I just tried a bunch of combinations on

Re: [CentOS] distributed storage/home-made cloud recommendations

2012-02-05 Thread Ljubomir Ljubojevic
On 02/06/2012 12:33 AM, John R Pierce wrote: > On 02/05/12 3:24 PM, Ross Walker wrote: >> It might be easier to do the striping in software cause that's a zero >> over-head operation and it makes the hardware RAID easier to setup, maintain >> and can make rebuilds less painful depending on the co

Re: [CentOS] distributed storage/home-made cloud recommendations

2012-02-05 Thread John R Pierce
On 02/05/12 3:49 PM, Ljubomir Ljubojevic wrote: > What about Software RAID 10 (far)? It gives 2 x read speed and 1 x write > speed (speed of single HDD). we use raid10 for all our database servers. often as many as 20 disks in a single raid set. -- john r pierceN

Re: [CentOS] configure network bridge listing bridged intefaces

2012-02-05 Thread Mihamina Rakotomandimby
On 02/04/2012 07:53 AM, Robert Spangler wrote: > > DEVICE=eth# > ONBOOT=yes > BRIDGE=br# > Thank you so much, Robert. That is the thing I wanted to do. For the record, in Debian world, it's auto br0 iface br0 inet static address 192.168.0.10 network 192.168.0.0 n

Re: [CentOS] network intermitent, not sure if virtualization issue

2012-02-05 Thread Bob Hoffman
--- snip centos 6 host, centos 6 virtual machine. Network connection from outside server disappears in regards to the virtual server. snip --- Tested the heck out of it. Further testing shows the network unreachable, even if network restarted in host. A