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2017 Aug 25
2
GlusterFS as virtual machine storage
.... With or without sharding the operation is the same, it involves fiddling with gfids and is a bit annoying, but not that hard for one file. But with sharding enabled you'll need to pick each split brained shard out, which is I imagine a huge pain .. Again, just don't do 2 nodes, it's a _bad_ idea. Add at the very least an arbiter. -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 833 bytes Desc: Digital signature URL: <http://lists.gluster.org/pipermail/gluster-users/attachments/20170825/1ab76749/a...
2012 Feb 14
4
How to escape exec command parameters?
If I have a "simple" variable value, this works fine: capmon@peter:~> puppet -e ''$v="xyz" exec { f: command => "/bin/echo v is $v", logoutput => true }'' notice: /Stage[main]//Exec[f]/returns: v is xyz notice: /Stage[main]//Exec[f]/returns: executed successfully But how do I escape "bad" values of $v? Painful examples like the
2006 May 01
3
mongrel_cluster-0.1.1: the bird dog (capistrano support!)
Hey y''all: mongrel_cluster provides management tools for running Mongrel behind a reverse-proxy/load balancer. It is an extraction from Rails Machine, a deployment service and Ruby library that simplifies Rails application deployment. This release fixes bugs and adds a Capistrano task library. Changes: -changed pid file format to include port -only write configuration options
2017 Aug 25
0
GlusterFS as virtual machine storage
...arding the > operation is the same, it involves fiddling with gfids and is a bit > annoying, but not that hard for one file. But with sharding enabled > you'll need to pick each split brained shard out, which is I imagine a > huge pain .. Again, just don't do 2 nodes, it's a _bad_ idea. Add at the > very least an arbiter. > Big +1 on what was Kevin just said.? Just avoiding the problem is the best strategy. However, for the record,? and if you really, really want to get deep into the weeds on the subject, then the? Gluster people have docs on Split-Brain recovery...
2017 Aug 25
0
GlusterFS as virtual machine storage
Il 25-08-2017 21:48 WK ha scritto: > On 8/25/2017 12:56 AM, Gionatan Danti wrote: > > > We ran Rep2 for years on 3.4.? It does work if you are really,really? > careful,? But in a crash on one side, you might have lost some bits > that were on the fly. The VM would then try to heal. > Without sharding, big VMs take a while because the WHOLE VM file has > to be copied over.
2017 Aug 25
2
GlusterFS as virtual machine storage
On 8/25/2017 12:56 AM, Gionatan Danti wrote: > > >> WK wrote: >> 2 node plus Arbiter. You NEED the arbiter or a third node. Do NOT try 2 >> node with a VM > > This is true even if I manage locking at application level (via > virlock or sanlock)? We ran Rep2 for years on 3.4.? It does work if you are really,really? careful,? But in a crash on one side, you might
2009 Mar 18
24
rename(2), atomicity, crashes and fsync()
Hi all, Recently there''s been discussion [1] in the Linux community about how filesystems should deal with rename(2), particularly in the case of a crash. ext4 was found to truncate files after a crash, that had been written with open("foo.tmp"), write(), close() and then rename("foo.tmp", "foo"). This is because ext4 uses delayed allocation and may not
2010 Mar 10
39
SSD Optimizations
I''m looking to try BTRFS on a SSD, and I would like to know what SSD optimizations it applies. Is there a comprehensive list of what ssd mount option does? How are the blocks and metadata arranged? Are there options available comparable to ext2/ext3 to help reduce wear and improve performance? Specifically, on ext2 (journal means more writes, so I don''t use ext3 on SSDs,