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The problem is that I will only start to notice performance problems after it has written many backups, right? Because the amount of chucks written will increase and it may become a performance problem after a while?

For testing PBS I have a server with 24x 960Gb SSD's. For the best performance I should go for 12 mirror sets, right? This way I will get roughly 11TB of usable storage. Does it make sense to go for a configuration like: 8x raidz1? This way I will still have 8 stripes over raidz1 (with 3...

Ok. I think we can work something out like that :-) . Thanks for the tip. I was just thinking about if we should be going the raidz-1 or raidz-2 road or straight for a zfs mirror like we do with hdd’s. But raidz is going to limit the speed to the speed of a single ssd. So maybe we better go...

With our zfs send/recv solution, which we are using right now, the backup server is actually a proxmox ve host with no vm’s running on it. It’s used as a backup server directly and it was added to the cluster. By doing so we can simply clone a zfs zvol (a backup) on that server, launch a vm...

Ok. Thanks for the clear explanation. That helped a lot!

Ok. Thanks I’m still a bit confused on how VE knows what to send. Does it keep some kind of snapshot to track all changes since the last run? And if so, isn’t that hitting the VM performance? I’m trying to understand how it all works before I start :)

Ok. So I better buy some enterprise ssd’s en go for an ssd only storage :-) Other question: if it’s writing chunks of changes. Then how does it handle removing old backups? Does it need to send the whole vm’s again ( like it has to do initially?) from time to time?

The PBS manual says that we should use ssd only storage. Is performance going to be ok when using a special device with hdd’s? And how big should the special device be? The server already has 2x 120gb sm863 as a boot device (i had those ssd’s laying around…). Maybe I can repartition those and...

I want to test PBS to backup 18Tb of VM’s (on proxmox ve). What kind of SSD’s would you recommend? Buying enterprise SSD’s is quite expensive and maybe consumer grade ssd’s are fit for these kind of backups? After all it’s only sending incremental changes, right? What do you think? I also...

Thanks for clarifying this!

Hi, I'm setting up a cluster with E5-2673v3 CPU's and I'm wondering if I should either enable or disable the logical processors in the bios? Back in the old days I knew I had to disable "hyperthreading" but now I'm unsure. Maybe it's better to have it enabled these days? Thanks for your help

Okay. Thanks ;-)

For my installation (which is small, as explained above) this would be a very welcome feature. We're going to install somewhere in the next 2 or 3 weeks. It would be nice if we can start with this feature available but I do understand that there are probably more urgent feature requests/bug...

A couple of days ago I extensively tested this by adding the blocks in one or both of the lists. The example above was an example with the IP address added to both whitelists. If It's not in Configuration > Mail Proxy > Whitelist then there's no "postfix/postscreen[26283]: WHITELISTED " entry...

The IPv6 IP's are whitelisted there already. In my mail.log I can see this prior to the log posted earlier: Jan 17 20:57:40 mx10 postfix/postscreen[26283]: CONNECT from [2a01:111:f400:7e0d::206]:64039 to [2001:xxxx:xxx:xxx::x]:25 Jan 17 20:57:40 mx10 postfix/postscreen[26283]: WHITELISTED...

When email arrives from an IPv4 IP (whitelisted the same way as the IPv6 IP's) it works as expected. So I think this confirms the whitelist rule is configured perfectly fine ;)

Yes but with local disks performance will be better compared to Ceph. Ceph also requires at least 3 nodes while ZFS replication can be done with only 2 nodes. For a small installation that actually can run al VM's on a single server I want to spread the load over two nodes, just to be safe...

I thought migration of VM's on local storage wasn't even possible at all, yet. You're not using a replicated ZFS storage, right? I actually want to know if migrating VM's on replicated ZFS storage can be live migrated too these days?

We are planning to install a new proxmox cluster for hosting VM's. I can get a couple Dell R730XD servers but I'm unsure what to buy exactly. We do want the VMs to be fast so we're going enterprise SSD's only. For one. I'm not sure which storage option to choose from. Ceph sounds interesting...

Other example: Jan 17 20:57:40 mx10 postfix/smtpd[26337]: connect from mail-he1eur04lp0206.outbound.protection.outlook.com[2a01:111:f400:7e0d::206] Jan 17 20:57:41 mx10 postfix/smtpd[26337]: Anonymous TLS connection established from...