ср, 6 янв. 2021 г. в 20:04, Matthias G. Eckermann <[email protected]>:
> Hello, > > On 2021-01-06 T 18:56 +0300 Matwey V. Kornilov wrote: > > > I have a question on JeOS images being built for ARM boards. I > > suppose that we agree that most target SBCs use microSD cards to > > store and run the OS. There are exceptions though. > > > > Currently, half of JeOS images are supplied with ext4 and the other > > half - btrfs. > > I think, this is based on personal choice of the person who creates > the images... > > > And frankly speaking, I cannot figure out the rule why > > some specific board receives JeOS with ext4 instead of btrfs or > > vice-versa. I suppose this was related somehow to btrfs support in > > u-boot, right? > > Some historic background on the SUSE Linux Enterprise side (from > around 2016): one of the reasons to use btrfs for microSD cards for > SLES on RPi3 was that, combined with compression on the filesystem > level, the number of IOPS needed is reduced, and booting (and other IO > related activities) speeds up, as the cost of (de)compression is lower > than the IO latency. > As far as I understand, you have to mount btrfs with `compress' option to force the compression by default. >From what I see in openSUSE JeOS, there is no `compress' in /etc/fstab by default. > > So long - > MgE > > > Another consideration. Does anybody know any research on what FS is > > the most friendly to SD cards? > > -- > Matthias G. Eckermann, Director Product Management Linux Platforms > SUSE Software Solutions Germany GmbH - Maxfeldstr. 5 - 90409 Nürnberg > (HRB 36809, AG Nürnberg) Geschäftsführer: Felix Imendörffer > -- With best regards, Matwey V. Kornilov
