| 1 |
On Sun, May 09, 2010 at 07:39:01PM -0300, Crístian Viana wrote: |
| 2 |
> what exactly is this reserved block count? is it about the number of inodes? |
| 3 |
> does that mean that, by default, regular users can only use 95% of the |
| 4 |
> inodes? and why did I use all these inodes? I don't think I have that many |
| 5 |
> small files on this partition... |
| 6 |
|
| 7 |
When the filesystem fills up, services can start failing left and |
| 8 |
right because they cannot write logs, cannot write temp files, etc. At |
| 9 |
this point human intervention is necessary: root has to log in and |
| 10 |
clear out the disk. But if the $ROOT filesystem is completely full, |
| 11 |
one may not even be able to log in and/or that one cannot do any sort |
| 12 |
of maintenance that is needed. So you have some sort of circularity. |
| 13 |
(In which case you have to reboot, perhaps using another medium...) |
| 14 |
|
| 15 |
The way out is to reserve some breathing room for root so that when |
| 16 |
everybody else is having problems he can still get in and fix the |
| 17 |
problem. |
| 18 |
|
| 19 |
The 5% is historical from days when disks are much smaller. If you |
| 20 |
have a sensible partition scheme you only really need to reserve the |
| 21 |
blocks on the $ROOT filesystem. If the partition in question (IIRC) is |
| 22 |
only for /home, then you can just turn off the reserved blocks all |
| 23 |
together. |
| 24 |
|
| 25 |
Cheers, |
| 26 |
|
| 27 |
W |
| 28 |
-- |
| 29 |
Willie W. Wong wwong@××××××××××××××.edu |
| 30 |
Data aequatione quotcunque fluentes quantitae involvente fluxiones invenire |
| 31 |
et vice versa ~~~ I. Newton |
Archives