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Autofs: too many open files issue
by Carles Acosta Silva 19 Apr '24

19 Apr '24

Hi, We are running AlmaLinux 9.3 on several nodes that normally use autofs to mount different kinds of remote directories. Since the last week, we are seeing these errors: automount[2150866]: open_pipe:161: failed to open pipe: Too many open files And automount stops working. It does not seem that any user has arrived at the maximum number of open files. Do you have any idea where we can look to find a solution? Thank you in advance. Best regards, Carles

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Almalinux and integritysetup speed problem
by Alessandro Baggi 10 Apr '24

10 Apr '24

Hi list, I'm trying on a spare machine dm-integrity with mdadm raid1. This is an old machine (i7-2600k). I'm using 2x500GB wd caviar black SATA3. I'm trying to run some test and see how much performance changes using dm-integrity. First I created a raid1 with mdadm and checked the performances and writing 50G I got 100 MB/s Then I destroied the md device and on every disk I run: # integritysetup format --integrity xxhash64 /dev/sdb1 # integritysetup format --integrity xxhash64 /dev/sdc1 During this process the performances was good ~95MB/s. After this I opened the devices with: # integritysetup open integrity xxhash64 /dev/sdb1 sdb1 # integritysetup open integrity xxhash64 /dev/sdc1 sdc1 and created the mdadm array with: # mdadm --create /dev/md10 --level=raid1 --raid-devices=2 /dev/mapper/sdb1 /dev/mapper/sdc1 and reading on /proc/mdstat I got this: [>....................] resync = 1.1% (4929792/443175424) finish=677.3min speed=10782K/sec Why there is so big drop on speed during the sync? I'm missing something? I'll need 11 hours to sync 2x500GB hdd? Why so slow? Before this I tried the same on a newer machine with i7 8700k and 2x2TB WD gold and I get a drop sync speed at ~35MB/s. There is something that I can do to improve this? Thank you in advance. Alessandro.

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AlmaLinux Appstream
by Alessandro Baggi 09 Apr '24

09 Apr '24

Hi list, I've noticed that RHEL has several type of appstream: RHEL 9 Application Streams Release Life Cycle RHEL 9 Full Life Application Streams Release Life Cycle RHEL 9 Rolling Application Streams Release Life Cycle from here: https://access.redhat.com/support/policy/updates/rhel-app-streams-life-cycl… I noticed that in application streams there less software that in AlmaLinux appstream. Why? They are RHEL binded packages (licenses etc...)? I noticed also that there is a rolling appstream which includes firefox 102 and other app. Is that rolling appstream available for AlmaLinux? Thank you in advance

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03 Apr '24

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03 Apr '24

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03 Apr '24

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ZFS and AlmaLinux 9.X
by Alessandro Baggi 28 Mar '24

28 Mar '24

Hi list, I would install ZFS on my backup server. It runs Almalinux 9.3 and actually it saves data on RAID1 MDADM. From what I read I can install ZFS from OpenZFS repositories for EL and choose between kABI tracking or DKMS. I read that using kABI module I will have problem when a new minor release will be released because I must wait that the kABI module from OpenZFS repo team should be built to support the new kernel. Have someone used the kABI module? How many time you need to wait the new module? Are they quick releasing it? The other method is using DKMS, so at every kernel update I need a DKMS recompilation with a possible problem during recompilation. Ok I will have the old module with the previous kernel that will work. How much DKMS recompilation problem occours? What is the best method in your experience? Thank you in advance. Alessandro.

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28 Mar '24

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New proposed AlmaLinux HPC/AI SIG in formation
by Hayden Barnes 21 Mar '24

21 Mar '24

Hello community. I am Hayden Barnes, the Senior Open Source Community Manager for AI software at HPE. A group of us have been discussing the possibility of forming an official HPC/AI SIG to promote the benefits of AlmaLinux for HPC and AI, provide guidance and support for AlmaLinux users in HPC and AI, and represent the interests and needs of the HPC and AI community within AlmaLinux. We have prepared a draft SIG proposal: Proposal - https://github.com/sirredbeard/wiki/blob/master/docs/sigs/HPC%20and%20AI.md Draft PR - https://github.com/AlmaLinux/wiki/pull/370/files I would like to invite participation, comments, feedback, and suggestions from the broader AlmaLinux community. Are you using AlmaLinux in HPC or for AI/ML applications? Are you interested in becoming involved in the SIG or attending SIG events? Do you have any feedback on our proposal? I look forward to hearing from you! Hayden Barnes Senior Open Source Community Manager Determined AI and Pachyderm AI Solutions Hewlett Packard Enterprise (HPE) hayden.barnes(a)hpe.com https://twitter.com/unixterminal http://linkedin.com/in/thbarnes

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Using bluetooth serial (RFCOMM) on AlmaLinux 9
by Marc Balmer 19 Mar '24

19 Mar '24

I am running the latest AlmaLinux 9 on a Raspberry Pi 3/4 computer. I want to communication with a Bluetooth device that uses the serial communication (SPP) profile. Using bluetoothctl I see the device, and I pair with it. However, I can not establish the serial link, i.e. I don’t have a /dev/rfcomm0 device to communicate. In other Linux distributions there exists the rfcomm command to connect to a Bluetooth serial device, but in AlmaLinux 9 this is not available. How can I establish a serial link over Bluetooth, then? The rfcomm kernel is present in AlmaLinux 9. Thanks, mb

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