I haven't watched neo4j run for long periods of time, but I would try
this to start:
- put everything on HDD
- shut down Neo4j
- move everything under graph.db, keystore, and possibly rrd on SSD
- create symlinks for the graph.db directory and the keystore and
possibly rrd files
- create a symlink from messages.log back to somewhere on HDD [but
see notes below]
- start Neo4j back up again
- create a github issue for Neo4j to put *all* log files under the
log directory - or better yet see my file location note below
However, this won't work the way it should if Neo4j is constantly
creating new messages.log files under graph.db
If it does, then you could create a cron job to move old ones back to
SSD. Most apps never reference the old log files. You could use
Michael Hunger's suggestion to limit the size of messages.log file.
To tell the truth, I really don't like the idea that they mix code and
data in the same directory structure during install. That's generally a
bad practice - kind of Windows 3.11 thinking - where everyone just
slapped everything under C:\ That went out in the last millennium.
Apps should be able to locate things into three areas:
apps - which should go in the standard place for the OS [NOT /var]
data - which should default to a standard location but be be
controllable
logs - which should go into a standard location for the OS - or
better yet use the OS logging mechanism [like syslog]
and you should probably use logrotate for those OSes that
use it.
Linux and I suspect POSIX has standards for these things, and they don't
mix everything together on /var.
A note about using syslog -- if your app is going to log a lot, it can
get blocked by syslog calls - so you may want to log in a separate
process or thread
On 08/28/2014 10:52 PM, Frandro wrote:
Do I have to link newly created files via symlinks?
They are growing really fast.
2014년 8월 29일 금요일 오전 9시 34분 8초 UTC+9, AlanR 님의 말:
Run it on a Linux/UNIX system and use symlinks :-D. Symlinks are
your friend.
There's probably also a config option -- but this is universal --
and easy.
On 08/28/2014 06:29 PM, Frandro wrote:
Logical logs are big files as you know.
I'd like to separate them from the database file as follows since
SSD costs a lot.
Graph DB main files are stored in an SSD partition.
Logical log files are stored in a HDD partition.
Is it possible?
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