Let’s tally up. For reference, this is one of a series of posts regarding compression testing on zpools: Experimenting with compression off Experimenting with compression=lz4 Experimenting with compression=zstd Compression results – you are here Samsung-SSD-870 4TB SSD For the Samsung-SSD-870 4TB SSD no compression we had: 2:34 = 154s 2:32 = 152s 2:30 = 150s 3:52 = 238s 4:46 = 286s 4:16 = 256s 4:15 = 255s 4:15 = 255s 4:49 = 289s […]
Compression results Read More »
When I destroyed the zpools when I was done with zstd compression testing, these errors appeared in /var/log/messages: You’d be shocked to learn these messages appear when creating a zpool with those devices: [12:21 r730-01 dvl ~/tmp] % sudo zpool create Samsung-SSD-980-PRO-geom-issues mirror /dev/nda1 /dev/nda2 re: Background: these two devices were part of a zpool before I started playing with them. They had partitions on them. Recovery and destroy There may be a
GEOM: nda1: the primary GPT table is corrupt or invalid Read More »
Following on from my previous post where I tested lz4, let’s try compression=zstd. Experimenting with compression off Experimenting with compression=lz4 Experimenting with compression=zstd – you are here Compression results First, we delete the old: [21:19 r730-01 dvl ~/tmp] % sudo zpool destroy Samsung-SSD-870-compression-lz4 [21:19 r730-01 dvl ~/tmp] % sudo zpool destroy Samsung-SSD-980-PRO-compression-lz4 [21:19 r730-01 dvl ~/tmp] % sudo zpool destroy Samsung-SSD-990-EVO-compression-lz4 Then create the new: [21:19 r730-01 dvl ~/tmp] % sudo zpool create
Experimenting with compression=zstd Read More »
Following on from my previous post where I tested with compress off, let’s try compression=lz4. Experimenting with compression off Experimenting with compression=lz4 – you are here Experimenting with compression=zstd Compression results First, we delete the old: [19:45 r730-01 dvl ~] % sudo zpool destroy Samsung-SSD-870-no-compression [19:45 r730-01 dvl ~] % sudo zpool destroy Samsung-SSD-980-PRO-no-compression [19:46 r730-01 dvl ~] % sudo zpool destroy Samsung-SSD-990-EVO-no-compression [19:46 r730-01 dvl ~] % Then create the new: [19:47
Experimenting with compression=lz4 Read More »
Now that the new storage is in place, I thought to test with compression on and off. Perhaps also use both lz4 and zstd. For reference, this is one of a series of posts regarding compression testing on zpools: Experimenting with compression off – you are here Experimenting with compression=lz4 Experimenting with compression=zstd Compression results My plan: create three zpools of two mirrored devices and test. There will be three posts: compression off,
Experimenting with compression off Read More »
I notice I also worked with some SSDs at the end of this post – I have since amended the title of this post. In this post: FreeBSD 14.3 Today I removed two existing NVMe cards, each with a 1TB stick on it. Those sticks were added to these cards: If you want the same hardware, you can use these links. As an Amazon Associate I earn from qualifying purchases. These are all
Adding in new NVMe cards and sticks – and replacing two SSDs Read More »
In recent posts: Doing a bit of stress work on a new HDD x8dtu: adding in the smaller drive Swapping zpools – moving from using main_tank to using data If you have a look over those posts, you’ll see why you never want to downsize a zpool. In this post: FreeBSD 14.2 removing the zfs labels from an drive which was part of a zpool which is no longer in use destroying the
Clear the existing good drive and add it to the new zpool Read More »
As mentioned in Doing a bit of stress work on a new HDD, I have a failing 5TB drive which is going to be replace by a 4TB drive. Only about 1.45TB are used, so there’s plenty of space to grow. If you get one thing from this post, don’t be downsizing zpools like this. I would have had much less work and opportunity for error, if I had returned that 4TB drive
Swapping zpools – moving from using main_tank to using data Read More »
I was up at 5:30 AM today. I packed the car and headed out. I arrived within the datacenter at about 8:15 or so. By 8:50, I was on IRC and the photos of the FreeBSD racks were uploading. Since I was going there anyway, I did some inventory and disposal work (a decommissioned server, about 25 old HDD, and various bits and pieces). I must say though, I’m not liking this option.
x8dtu: adding in the smaller drive Read More »
As foreshadowed in x8dtu – drive problems, I will be visiting a data center soon to replace a 4TB HDD. The replacement HDD arrived last night. It was unceremoniously tossed onto the front porch by the courier. However, it was properly packaged. I’m sure it’s fine. The original idea: put this drive into a host, and write some data to it, to exercise it a bit. As you will soon learn, that is
Doing a bit of stress work on a new HDD Read More »