Tagged Questions

2
votes
0answers
42 views

Does enabling ACLs have an effect on performance?

I'm looking at a web application that needs ACLs enabled. Are there any benchmarks or other documents to show what potential impact ACL does{n't} have when the file system is under heavy load? Also, ...
6
votes
3answers
252 views

Tell the kernel to strongly cache a particular directory

This question is a rephrasing of Optimizing EXT4 performance. I have a directory that contains build files, most very small, but totaling 5.6G. I usually access the same subset of files (some ...
0
votes
1answer
257 views

Can you apply noatime on Ext3 partitions at realtime?

an application accesses a disk directory containing about 3 million files (including directories). I would like to apply the noatime option for that filesystem and I would like to know whether I can ...
0
votes
0answers
24 views

Choosing File System for Solid State Drive [duplicate]

Possible Duplicate: How do I optimize the OS for SSDs? I have just bought a Sandisk 120 GB Solid State Drive on which I want to run Ubuntu 12.10 as fast as possible. What's the recommend ...
2
votes
0answers
35 views

Question regarding power outages affect on ubuntu [duplicate]

Possible Duplicate: How resilient is Ubuntu to repeated “power-off” shutdowns? Due to some reasons, sudden power outages are common at my place so my current operating system ...
3
votes
1answer
1k views

How to speedup Ubuntu when user home directory on NIS/NFS?

I discovered that Ubuntu 11.04 is kinda slow when you have your home directory on NFS, even when NIS itself doesn't have any performence issues. Still it seems that many applications including ...
4
votes
4answers
2k views

How does ecryptfs impact harddisk performance?

I have my home directy encrypted with ecryptfs. Does ecryptfs lead to fragmentation? I have the feeling that reading files, displaying folders and login became continuously slower and slower ...
4
votes
2answers
1k views

What differences do I need to know choosing between ext4 and NTFS (Performance etc)

I understand that ext4 if faster than NTFS. But whats the speed difference if its like < 20MB/s, perhaps its better to use NTFS for convinence? What are the other implications of this apart from ...
5
votes
3answers
2k views

How to speed up rsync/tar of large Maildir?

I have a very large Maildir I am copying to a new machine (over 100BASE-T) with rsync. The progress is slow. VERY SLOW. Like 1 MB/s slow. I think this is because it is a lot of small files that ...
6
votes
1answer
418 views

Is My Filesystem Corrupt or Something?

OK, so for the past 2 days my Ubuntu Install (10.10) has been acting in a very strange manner. Just after the login process is done, and the desktop is loading everything seems to be fine, it is fast ...
40
votes
2answers
19k views

Is it worth to tune Ext4 with noatime?

With previous versions of Ubuntu (using Ext3 filesystem) I used to tune it for better performance with noticeable results by setting the noatime parameter in /etc/fstab. Is it still worth it to do ...
2
votes
2answers
2k views

Occasional excessive IOWait freezes computer - how to diagnose?

I have a very slow SSD on an eeepc900A, and it occasionally freezes the OS (even the mouse pointer) with system monitor showing excessive IOWait. How can I diagnose what is causing this and should ...