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 […]| Dan Langille's Other Diary
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-lz...| Dan Langille's Other Diary
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 ...| Dan Langille's Other Diary
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, […]| Dan Langille's Other Diary
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.| Dan Langille's Other Diary
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).| Dan Langille's Other Diary
The actual largest date that can be represented in an EXT4 file system is 2446-05-10 22:38:55. Curious about why? Read on for a breakdown of how EXT4 timestamps are encoded, or skip ahead to “…| Righteous IT
In my earlier write-ups on XFS, I noted that when a file is deleted: This combination of factors should make it straightforward to recover deleted files. Let’s see if we can document this recovery process, shall we? For this example, I created a directory containing 100 JPEG images and then deleted 10 images from the… Continue reading Recovering Deleted Files in XFS→| Righteous IT
In my previous post, I mentioned that I found a number of oddities when digging through the details of various Atari 8-bit file systems. I read through the specifications I could find online, and ran the actual code in emulators to verify and discover details when the specifications were unclear or incorrect. There were some surprising finds.| Mad Man with a Compiler
I got my start with computers as a kid with an Atari 800 way back when. When I'm feeling nostalgic, I still enjoy pulling it out and playing with it. These days, I'm more likely to pull out an emulator than the real thing, as they're now so precise that it's very difficult to find a difference, and it eliminates all the hassles involved with disks that were slow and may have failed with age. That means I need tools for manipulating disk images.| Mad Man with a Compiler
