In data martedì 27 febbraio 2018 17:53:26 CET, Anton Aylward ha scritto:
On 27/02/18 08:16 AM, stakanov wrote:
In data martedì 27 febbraio 2018 14:02:15 CET, Anton Aylward ha scritto:
On 27/02/18 06:21 AM, stakanov wrote:
My choice for file system on that machine is EXT4 no encrypted.
So what you are NOT asking is ..
What is the best FS to use with a SSD?
No, I am not, because:
a) I tried btrfs and xfs (like the default). Sorry for giving Richard a bad time, but I experienced: a very complicated system of partitions that in case is making repairs not really handy.
Agreed. Similar experiences with rotating rust.
b) expecially with xfs I had (after crashes that - to the countrary to what one may expect - were not so rare as they should be) always repairs to do with manual steps to be done, with EXT4 never any problem.
I've had one bad experience with XFS but the user group was helpful. Never the less for what it takes, I don't care for XFS compared to others.
But the 'others' don't lead me to ext4.
c) I did not experience any(!) performance problem with any of the FS, so substantially with my experience and my hardware I do not have particular advantage in this point.
The problems I have with ext4 are the same I had with UNIX V7's Fs back in the 1970, with the Berkeley FastFileSystem in the 1980s, and so on down the line through SCO, Convergent and others and earlier versions of Linux.
There is a fixed division between inodes and data, and you have to specify that at mkfs time. It is softened if you have a huge disk, but it hasn't gone away.
The thing is that the B-tree technology that gets around this problem has been with us for a long time: XFS, JFS, ReiserFS. All decades old, older then ext4, and don't have that problem.
I've used JFS and ReiserFS extensively and they are *VERY* reliable. "Age does not wither" - to paraphrase the Bard.
Performance? Performance at WHAT? The FS perform differently ,very differently under different types of tests. I've also tried running big-name database system on raw partitions rather than file systems to compare, and that gives a notable edge. By comparison, XFS works just great with BIG files, like movies (I have none under 1Meg and most are over 1000Meg) or music (typically 5Meg but a couple of soundtracks out at 33Meg). Then there's photos. I shoot RAW for the bulk of my unprocessed images are either 16Meg or 24Meg and JPGs ranging from a few hundred kb up to as much 50G for a stitched together panorama.
d) I am particular conservative on that machine, run leap and do not experiment. It has amd and not nvidia (that is you do not need the rollback every 5 minutes because the industry fucked it up another time.
Granted. I'm obsessive about stability and reliability on production machines, which is one reason I use Reiser and JFS rather than ext4. See above. Once I ran out of inodes under ext4 when there was quite ample data space. It puzzled the users and the then sysadmin.
NEVER AGAIN! NEVER!
e) am am not aware of any "better" file system for ssd. I you know you can suggest, but by my performance pattern I do not even see a problem havin a swap on my machine (which will be used anyway only for suspend).
There have been file systems specifically designed for SSD by concerned vendors.
Samsung designed F2FS specifically for NAND gate technology. The reasoning is: why find a file system that plays nice with an SSD when there is one specifically built for it?
Another FS built specifically for SSD is IotaFS. I've no notes on that other than the original design paper. As far as I can gather that is based on the Minix2FS and has the same inode/data separation problems as the V7FS and ext4.
Of course such matters as alignment, journalling, blocking factor, span sizes, and possibly other factors will severely affect the performance of a a file system, and as such might be more noticeable in percentage terms with a SSD. > Q: Are you sure? > >> A: Because it reverses the logical flow of conversation. >> >>> Q: Why is top posting frowned upon?
Well, before Reiser FS got "out of fashion", I was very happy with it. I never really understood why the development stopped on it (unless it was a one man show, then the reason was a dead wife. Sorry for the black humor, I am aware it was not funny for the wife). F2FS I was not aware opensuse offered it...does it? I do understand your issue with I inodes, but I am dead sure it will not happen to me ever with my uses cases. Finally I did the install with grub written to / and the whole as standard swap and ext4. Seems to run well. Thank you for all the info, will have a look at the future of F2FS. Samsung seems quite active with OSS recently...... _________________________________________________________________ ________________________________________________________ Ihre E-Mail-Postfächer sicher & zentral an einem Ort. Jetzt wechseln und alte E-Mail-Adresse mitnehmen! https://www.eclipso.de -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org