3 ms·

How does this compare to NVMe based AWS EC2 instances like m5d, c5d, r5d?

mrep 8y ago
A better comparison would be EC2 x1 instances which are high memory instances designed for SAP HANA like these ones: https://aws.amazon.com/ec2/instance-types/x1/ https://aws.amazon.com/ec2/instance-types/x1/
manigandham 8y ago
It's between RAM and SSD. Much closer to RAM speeds but data persists after turning off power. Biggest advantage over just being a faster disk is that it's byte-addressable random access like memory, so you don't have to deal with writing pages/blocks to drives. The throughput and latency is fast enough that many apps can skip using memory and work straight from this. We already see this in some mobile devices that only have solid state and instant boot times because the data is always ready, with no need to shift from disk to ram. It'll be awhile before OS and applications take advantage but it has potential to be a major shift in how storage works.
boulos 8y ago
Disclosure: I work on Google Cloud. NVMe is (now) a more general purpose "speak to flash like things". This Optane memory stuff is made of "flash", but unlike our Local SSD offering (or AWS's i3) it's at a latency and throughput closer to DRAM. Despite it being marketing material, I find the pyramid diagram [1] helpful. This blog post is about "Optane Persistent Memory". [1] https://newsroom.intel.com/wp-content/uploads/sites/11/2018/05/filling-the-gaps-between-memory-and-storage-after.png https://newsroom.intel.com/wp-content/uploads/sites/11/2018/...
- ssvss 8y ago
  What is its latency compared to RAM, 10X ? Most latency comparisons mentioned in other comments compare RAM to pcie based optane memory, not the DRAM optane memory. Edit: Article[1] here says the latency was 40µs with 13M IOPS, if you consider RAM latency to be 100ns[2], then it looks like 40X [1] - https://blogs.technet.microsoft.com/filecab/2018/10/30/windows-server-2019-and-intel-optane-dc-persistent-memory/ https://blogs.technet.microsoft.com/filecab/2018/10/30/windo... [2] - https://gist.github.com/jboner/2841832 https://gist.github.com/jboner/2841832

mrep 8y ago

A better comparison would be EC2 x1 instances which are high memory instances designed for SAP HANA like these ones: https://aws.amazon.com/ec2/instance-types/x1/ https://aws.amazon.com/ec2/instance-types/x1/

manigandham 8y ago

It's between RAM and SSD. Much closer to RAM speeds but data persists after turning off power. Biggest advantage over just being a faster disk is that it's byte-addressable random access like memory, so you don't have to deal with writing pages/blocks to drives. The throughput and latency is fast enough that many apps can skip using memory and work straight from this. We already see this in some mobile devices that only have solid state and instant boot times because the data is always ready, with no need to shift from disk to ram. It'll be awhile before OS and applications take advantage but it has potential to be a major shift in how storage works.

boulos 8y ago

Disclosure: I work on Google Cloud. NVMe is (now) a more general purpose "speak to flash like things". This Optane memory stuff is made of "flash", but unlike our Local SSD offering (or AWS's i3) it's at a latency and throughput closer to DRAM. Despite it being marketing material, I find the pyramid diagram [1] helpful. This blog post is about "Optane Persistent Memory". [1] https://newsroom.intel.com/wp-content/uploads/sites/11/2018/05/filling-the-gaps-between-memory-and-storage-after.png https://newsroom.intel.com/wp-content/uploads/sites/11/2018/...

ssvss 8y ago
What is its latency compared to RAM, 10X ? Most latency comparisons mentioned in other comments compare RAM to pcie based optane memory, not the DRAM optane memory. Edit: Article[1] here says the latency was 40µs with 13M IOPS, if you consider RAM latency to be 100ns[2], then it looks like 40X [1] - https://blogs.technet.microsoft.com/filecab/2018/10/30/windows-server-2019-and-intel-optane-dc-persistent-memory/ https://blogs.technet.microsoft.com/filecab/2018/10/30/windo... [2] - https://gist.github.com/jboner/2841832 https://gist.github.com/jboner/2841832