09-06-2017
Clustered filesystem which one to pick
Hi all,
I'm a bit new to advanced filesystem types. I've just only learned that if you wish to share a single fibre channel extent with many servers you need to use a clustered filesystem to prevent data corruption.
looking through a list of clustered file systems I saw gfs2 which I thought might be a good one to use. but is it the best for what I need or want to do?
I have a large 7TB fibre channel extent which is accessible by 14+ servers on the fibre channel network. I'd like each server to be able to use this storage space for the vHDs of their running VMs. I don't want to split up this 7TB into 500GB vdisks so each server can have a slice.
So I understand I need a special filesystem to do this. what would you recommend?
If it is an important detail I'll mention these 14 servers are Openstack Newton Nova/Compute nodes. (Ubuntu 16.04.3LTS)
my guess is I would have to format the drive as GFS2 from one of the 14 servers and then gfs mount it from all 14 servers
please let me know what you think of GFS2
or comment on what I' doing.
I'll gladly supply more info on my setup if you need it!
thx!
Last edited by rbatte1; 09-07-2017 at 04:52 AM..
Reason: Spelling
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LEARN ABOUT CENTOS
ares_set_servers
ARES_SET_SERVERS(3) Library Functions Manual ARES_SET_SERVERS(3)
NAME
ares_set_servers - Initialize an ares_channel name servers configuration
SYNOPSIS
#include <ares.h>
int ares_set_servers(ares_channel channel, struct ares_addr_node *servers)
DESCRIPTION
The ares_set_servers(3) function initializes name servers configuration for the channel data identified by channel, from a servers pointer
to a linked list of ares_addr_node structs holding name servers address data.
The name server linked list pointer argument may be the result of a previous call to ares_get_servers(3) or a linked list of ares_addr_node
structs setup by other means.
This function replaces any potentially previously configured name servers with the ones given in the linked list. So, in order to configure
a channel with more than one name server all the desired ones must be specified in a single list.
ares_set_servers(3) does not take ownership of the linked list argument. The caller is responsible for freeing the linked list when no
longer needed.
This function is capable of handling IPv4 and IPv6 name server addresses simultaneously, rendering ares_init_options(3) with optmask
ARES_OPT_SERVERS functionally obsolete except for IPv4-only name server usage.
RETURN VALUES
ares_set_servers(3) may return any of the following values:
ARES_SUCCESS The name servers configuration was successfuly initialized.
ARES_ENOMEM The process's available memory was exhausted.
ARES_ENODATA The channel data identified by channel was invalid.
ARES_ENOTINITIALIZED
c-ares library initialization not yet performed.
SEE ALSO
ares_set_servers_csv(3), ares_get_servers(3), ares_init_options(3), ares_dup(3)
AVAILABILITY
ares_set_servers(3) was added in c-ares 1.7.1
AUTHOR
Implementation of this function and associated library internals are based on code, comments and feedback provided in November and December
of 2008 by Daniel Stenberg, Gregor Jasny, Phil Blundell and Yang Tse, December 2009 by Cedric Bail, February 2010 by Jakub Hrozek. On March
2010 Yang Tse shuffled all the bits and this function popped out.
Copyright 1998 by the Massachusetts Institute of Technology.
Copyright (C) 2008-2010 by Daniel Stenberg
5 March 2010 ARES_SET_SERVERS(3)