i'm curious what straightforward storage structure wouldn't be. trying to second-guess ssd firmware seems a tricky design criterion.
On Tue, 28 May 2024 at 20:34, <wb.kl...@gmail.com> wrote: > For the napkin calculation: On disk, the IEntry is 38Bytes. Alas, writes > occur always in (the ssd internal) blocksize. So, essentially (assuming > 4096 byte blocksize, which is quite optimistic), we have a write efficiency > of less than 1 percent. > > A good firmware in the ssd could avoid needing a new block for the write, > if all bits are changed in teh same direction by the new data. This is > defeated by the binary search in the index buckets. The entries must be > sorted, and the number of used entries is tob updated. So, for each new > entry the whole (internal) block has to be remapped. Therefore an erasure > block must be erased after about 1m/4k index writes. > > It seems, venti in its current form is a ssd killer, if they are used for > the isects. > *9fans <https://9fans.topicbox.com/latest>* / 9fans / see discussions > <https://9fans.topicbox.com/groups/9fans> + participants > <https://9fans.topicbox.com/groups/9fans/members> + delivery options > <https://9fans.topicbox.com/groups/9fans/subscription> Permalink > <https://9fans.topicbox.com/groups/9fans/T2ca67486c7a13a77-M510201f156a99eb26c5c7268> > ------------------------------------------ 9fans: 9fans Permalink: https://9fans.topicbox.com/groups/9fans/T2ca67486c7a13a77-Me67a4d43e72cda0aa878fc21 Delivery options: https://9fans.topicbox.com/groups/9fans/subscription
