3 ms·

I was curious about the parenthetical "early" in your comment. Is this optimization no longer the case then? Could you elaborate on recent developments regardin

I was curious about the parenthetical "early" in your comment. Is this optimization no longer the case then? Could you elaborate on recent developments regarding this? I've been out of the NoSQL loop for some time and am genuinely curious.

tracker1 8y ago
The problem is, it varies... you have what are effectively key/value stores to document databases, column stores and everything in between. You have systems built on other systems. RethinkDB and Cockroach have different approaches than Redis, Mongo, Cassandra or others. CockroachDB gives an SQL interface over the top of a distributed data store with better consistency and relations. Cassandra has no real relations over a BigTable/Column-Store solution. It really just depends. I think with what's coming out of SSD/NVMe and even Optain DIMMS, that there will be databases directly tuned to control/set their own data storage in these environments.
- dorlaor 8y ago
  We at Scylla tune the kernel, drives, stride, clock source automatically and benchmark the disk to figure out what's its maximum parallelism so it won't queue (we can saturate 8 NVMe) and we'll do the queuing within the DB's userspace so we can prioritize real time queries over background tasks: https://www.scylladb.com/2018/04/19/scylla-i-o-scheduler-3/ https://www.scylladb.com/2018/04/19/scylla-i-o-scheduler-3/
- bogomipz 8y ago
  >"I think with what's coming out of SSD/NVMe and even Optain DIMMS, that there will be databases directly tuned to control/set their own data storage in these environments." I think this is already happening. I think it was Aerospike that used the FTL of of NANd/NVMe drives for a direct key value store and I think another vendor maybe Fusion had an SDK for this as well. The Optane stuff looks really interesting, are there any server vendors shipping with those?
  - Rafuino 8y ago
    Not OP but, yes, server vendors are shipping with Optane DC Persistent Memory, like Lenovo [1] and Supermicro [2], among others. Google also has a testing program [3, 4] with access to instances with 7TB of total memory. [1] https://lenovopress.com/lp1066-intel-optane-dc-persistent-memory https://lenovopress.com/lp1066-intel-optane-dc-persistent-me... [2] https://www.storagereview.com/supermicro_superserver_with_intel_optane_dc_persistent_memory_first_look_review https://www.storagereview.com/supermicro_superserver_with_in... [3] https://cloud.google.com/blog/topics/partners/available-first-on-google-cloud-intel-optane-dc-persistent-memory https://cloud.google.com/blog/topics/partners/available-firs... [4] https://docs.google.com/forms/d/e/1FAIpQLSeX1tN6Qt-aQUK2iVVioClFX5N-061jqO46vzpHzAPHkjwzVw/viewform https://docs.google.com/forms/d/e/1FAIpQLSeX1tN6Qt-aQUK2iVVi...
jchanimal 8y ago
By early NoSQL, I mean the projects that are basically an API wrapped around a data structure, that push the understanding of the data structure onto the developer. Newer products (like my employer FaunaDB) prioritize correctness and offer abstract query interfaces like GraphQL.

tracker1 8y ago

The problem is, it varies... you have what are effectively key/value stores to document databases, column stores and everything in between. You have systems built on other systems. RethinkDB and Cockroach have different approaches than Redis, Mongo, Cassandra or others. CockroachDB gives an SQL interface over the top of a distributed data store with better consistency and relations. Cassandra has no real relations over a BigTable/Column-Store solution. It really just depends. I think with what's coming out of SSD/NVMe and even Optain DIMMS, that there will be databases directly tuned to control/set their own data storage in these environments.

dorlaor 8y ago
We at Scylla tune the kernel, drives, stride, clock source automatically and benchmark the disk to figure out what's its maximum parallelism so it won't queue (we can saturate 8 NVMe) and we'll do the queuing within the DB's userspace so we can prioritize real time queries over background tasks: https://www.scylladb.com/2018/04/19/scylla-i-o-scheduler-3/ https://www.scylladb.com/2018/04/19/scylla-i-o-scheduler-3/
bogomipz 8y ago
>"I think with what's coming out of SSD/NVMe and even Optain DIMMS, that there will be databases directly tuned to control/set their own data storage in these environments." I think this is already happening. I think it was Aerospike that used the FTL of of NANd/NVMe drives for a direct key value store and I think another vendor maybe Fusion had an SDK for this as well. The Optane stuff looks really interesting, are there any server vendors shipping with those?
- Rafuino 8y ago
  Not OP but, yes, server vendors are shipping with Optane DC Persistent Memory, like Lenovo [1] and Supermicro [2], among others. Google also has a testing program [3, 4] with access to instances with 7TB of total memory. [1] https://lenovopress.com/lp1066-intel-optane-dc-persistent-memory https://lenovopress.com/lp1066-intel-optane-dc-persistent-me... [2] https://www.storagereview.com/supermicro_superserver_with_intel_optane_dc_persistent_memory_first_look_review https://www.storagereview.com/supermicro_superserver_with_in... [3] https://cloud.google.com/blog/topics/partners/available-first-on-google-cloud-intel-optane-dc-persistent-memory https://cloud.google.com/blog/topics/partners/available-firs... [4] https://docs.google.com/forms/d/e/1FAIpQLSeX1tN6Qt-aQUK2iVVioClFX5N-061jqO46vzpHzAPHkjwzVw/viewform https://docs.google.com/forms/d/e/1FAIpQLSeX1tN6Qt-aQUK2iVVi...

jchanimal 8y ago

By early NoSQL, I mean the projects that are basically an API wrapped around a data structure, that push the understanding of the data structure onto the developer. Newer products (like my employer FaunaDB) prioritize correctness and offer abstract query interfaces like GraphQL.