lia323

7 ms·

1. 1.▲
   by lia323 4mo ago

   wow, 3 controllers and 3TB of RAM for cache is pretty wild. I wasn't aware of that design before. Thanks for sharing!
2. 2.▲
   by lia323 4mo ago

   Thanks! The caption of Figure 1 lists the page size used by each system (i.e., the default configuration). We use different page sizes across systems, and as you said, it is a bit difficult to compare them directly apples-to-apples. This is
3. 3.▲
   by lia323 4mo ago

   If you are referring to controller-side NVRAM that sits before the SSDs at a higher layer, then yes, you are right that small writes can often be absorbed and consolidated there before reaching flash. Enterprise SSDs themselves seem to empl
4. 4.▲
   by lia323 4mo ago

   The end goal of the NoWA write pattern is conceptually similar to what you described, in the sense that NoWA tries to increase the chance that data becomes invalid together inside the SSD, which is also what mechanisms such as TRIM try to f
5. 5.▲
   by lia323 4mo ago

   All experiments in the paper were done using enterprise SSDs. Large write buffers inside the SSD can definitely help mask the performance degradation of slow flash writes by absorbing and consolidating updates before flushing to flash, but
6. 6.▲
   by lia323 4mo ago

   Thanks! I have not tested SQLite myself, but it would definitely be worthwhile to evaluate as well. SQLite would likely suffer from write amplification in a similar way as MySQL or PostgreSQL, since it is also a page-based DBMS with in-plac
7. 7.▲
   by lia323 4mo ago

   Thanks for pointing this out. I’ll add the reference to the arXiv version later. In our paper, we only evaluated with regular XFS (see Section 10.3, “What happens if a filesystem is used?” in the arXiv version), but evaluating Zoned XFS wou
8. 8.▲
   by lia323 4mo ago

   Hi, I’m the first author of the paper. Thanks for the interest and the kind comments. The extended version is available on arXiv if you’d like more details: https://arxiv.org/pdf/2603.09927 The appendix includes additi