On 22. dec. 2014 19.45.42 Almond <almond27...@gmail.com> wrote:
Hi, last questions please.
Please dont
let me understand better.
tmpfs is not RAM but HD?
Tmpfs is a filesystem, ramdisk is /dev/shm
those
tmpfs tmpfs 16G 0 16G 0% /dev/shm
tmpfs tmpfs 16G 33M 16G 1% /run
tmpfs tmpfs 16G 0 16G 0% /sys/fs/cgroup
tmpfs tmpfs 16G 33M 16G 1% /etc/machine-id
All the above is on ramdisk, since tmpfs is a subset of /dev/shm
are space on HD or max virtual space on RAM ?
Tmpfs will use disk space when kernel needs more ram to ramdisk, in the end
it could stop your os from running, this would not happend if you add a ssd
and mount it as a ramdisk :)
Speed is nice but use the right tool for speed
just need to add that
tmpfs /tmp tmpfs defaults,noexec,nosuid,noatime,nodiratime,size=512m
(if i want 512M)
to /etc/fstab
(and reboot?)
Drop this, use tmpwatch
Gentoo deletes all in /tmp on every boot, so keep in mind not to keep
important files there, ramdisk or not
or something else?
or better to create another partition on disk and then move the /tmp dir?
thanks
On 22/12/2014 19:32, David B Funk wrote:
> On Mon, 22 Dec 2014, Reindl Harald wrote:
>
>>
>> Am 22.12.2014 um 19:08 schrieb Almond:
>>> so you mean to move the /tmp partition from /dev/md2 to another
>>> partition, since /var/spool/mail and quota control are on the same
>>> partition?
>>> and what size to reserve to the new /tmp... ?
>>
>> well, we have it on tmpfs like below on our inbound mail-gw and use
>> in any SA/ClamAV related service (milters and so on) explicit
>> Environment="TMPDIR=/tmp" to make sure even /var/tmp is not used
>>
>> also /var/lib/postfix containing nothing else then caches and
>> lockfiles is on tmpfs to avoid "postscreen_cache.db" become IO bound
>> and have 99% of all processing in memory, hence also any postfix
>> configuration is using proxymap
>>
>> maybe that's why the mailgatewy has a load average of 0.0x all the
>> time, but keep in mind in our case it is *only* a inbound MX
>> filtering and scanning messages with no local storage handing over
>> clean messages to the final destinations via SMTP
>>
>> tmpfs /tmp tmpfs defaults,noexec,nosuid,noatime,nodiratime,size=512m
>> tmpfs /var/lib/postfix tmpfs
>> defaults,noexec,nosuid,noatime,nodiratime,size=64m,uid=89,gid=0,mode=0700
>
> Exactly, but I'd set that /tmp size to something like 10GB or more.
> He's got a 2TB root drive so no sense scrimping on /tmp and running
> into "fullness" problems later.
>
