L1 Cache greater than 32 GB
Posted: Wed Feb 19, 2020 1:29 pm
Greetings all,
We have PrimoCache running on a Lab SAN here in our Data Center that we are experimenting with to replace FreeNas in our production SANs. As we all know, FreeNas utilizes all available RAM to be an L1 Read Cache, and then there are ways to utilize SSD's or NvME drives as L2 Cache and also Write Cache. It's performance is legendary, however we are switching to an all-HyperV architecture.
We do NOT, however, want to use Storage Spaces for a few reasons that are internal and not relevant to this topic. Without Storage Spaces we cannot use Tiering.
We were wondering if the 32GB limit of L1 cache can be removed/bypassed? Our SAN has 256 GB of RAM and it doesn't make sense to NOT utilize that for READ cache. Cache obviously can make-or-break the performance of a SAN, and due to the large size of our SAN (approximately 120 TB) we use Disks as opposed to all SSD. We're not budgeted to migrate to Enterprise SSD's until 2023, the CFO is making us get our large investment out of this SAN array.
So... 32 GB limit. What can be done about this on the Server product?
TIA
Rick
We have PrimoCache running on a Lab SAN here in our Data Center that we are experimenting with to replace FreeNas in our production SANs. As we all know, FreeNas utilizes all available RAM to be an L1 Read Cache, and then there are ways to utilize SSD's or NvME drives as L2 Cache and also Write Cache. It's performance is legendary, however we are switching to an all-HyperV architecture.
We do NOT, however, want to use Storage Spaces for a few reasons that are internal and not relevant to this topic. Without Storage Spaces we cannot use Tiering.
We were wondering if the 32GB limit of L1 cache can be removed/bypassed? Our SAN has 256 GB of RAM and it doesn't make sense to NOT utilize that for READ cache. Cache obviously can make-or-break the performance of a SAN, and due to the large size of our SAN (approximately 120 TB) we use Disks as opposed to all SSD. We're not budgeted to migrate to Enterprise SSD's until 2023, the CFO is making us get our large investment out of this SAN array.
So... 32 GB limit. What can be done about this on the Server product?
TIA
Rick