Hi Frank,
by rsync to hdd, do you mean copying the db files or slapcat the
output to a file?
The first one seems to be a db killer if the db is in use while copying it. :)
I think the only safe way is by doing a slapcat after every write to
the db (accesslog?).
Anyway, sounds like a nice idea to me to get a big performance boost.
Have you considered SSDs instead of ramdisks?
Imo its the more safe and nearly as fast as ramdisk alternative. :)
Bye, Benjamin.
On Tue, Oct 19, 2010 at 10:40, Frank Bonnet<f.bonnet@esiee.fr> wrote:
Hello
I'm thinking to put db files in RAM instead of hard disk
for performance reasons.
FreeBSD ( and Linux thought ) provide some utility to build
RAMDISK ( md )
I did some tests in rebuilding db files with the slapcat/slapadd
commands
with RAMDISK
ldap3# time slapadd -l test.ldif
/usr/local/etc/openldap/slapd.conf: line 110: rootdn is always granted
unlimited privileges.
#################### 100.00% eta none elapsed 20s spd 633.9
k/s
WITH HARDDISK
ldap3# time slapadd -l test.ldif
/usr/local/etc/openldap/slapd.conf: line 110: rootdn is always granted
unlimited privileges.
#################### 100.00% eta none elapsed 04m22s spd 48.4
k/s
Does anyone runs production servers with ramdisk ?
I know it is risky but running rsyncd between ramdisk and a hardisk depot
would be safe huh ?
Thanks for any advices