# Cannot migrate my node **URL:** \ **Category:** troubleshooting\ **Tags:** docker, storagenode, linux, zfs\ **Created:** [May 10, 2021, 9:14pm UTC](https://forum.storj.io/t/cannot-migrate-my-node/13783 "2021-05-10T21:14:35Z")\ **Posts on this page:** 1\ **Showing post:** 37
**Author:** ![kevink](https://storj.bcdn.literatehosting.com/user_avatar/forum.storj.io/kevink/32/6077_2.png) [@kevink](https://forum.storj.io/u/kevink)\ **Post date:** [July 9, 2021, 6:16pm UTC](https://forum.storj.io/t/cannot-migrate-my-node/13783/37 "2021-07-09T18:16:37Z")
> [@Best Record size for zfs](https://forum.storj.io/t/best-record-size-for-zfs/10871/8): > > I was talking with @SGC a bit and thought that my answer might be of interested to more people: I have been thinking about recordsize a bit more and the use of compression in zfs. We have always been trying to find the best recordsize for storj and here are my considerations: Preventing read/write amplification (wasting of bandwidth) In general you use a smaller recordsize (default 128K) because files can be accessed and modified partly. This is the most obvious with databases (also applies to… > [@Best Record size for zfs](https://forum.storj.io/t/best-record-size-for-zfs/10871/11): > > It will shrink the recordsize down to the filesize in intervals of the logical blocksize, so for ashift=12 that would be 4KB. So a 9KB file would actually need 12KB (if it is completely uncompressable), a 720KB file would get a recordsize of 720KB (if it’s not compressible). Actually I read that this dynamic recordsize should work without compression too but I was unsure about it. But since compression doesn’t really take much performance (even less with lze iirc), it’s not a problem and comp… The compressratio is just showing how much space your files would end up using if there was no dynamic recordsize. Like a 9KB file would take 128K of space (recordsize 128k). That’s how the compressratio calculates. There’s no real space saving. (Maybe there is compared to other filesystems but idk about that. There’s no real compression compared to the real filesize) --- _[View the full topic](https://forum.storj.io/t/cannot-migrate-my-node/13783)._