Enum -
HostMemoryTierFlags(vim.host.MemoryTierFlags)
- Since
- vSphere API 7.0.3.0
Enum Description
Enumeration of flags pertaining to a memory tier.
Here are some examples of what the flags will look like for various memory
configurations:
- Traditional memory (MemoryTieringType#noTiering): The host has a DRAM tier
for the main memory and nothing else. The DRAM tier will have the
MemoryTierFlags#memoryTier flag.
- App Direct mode (MemoryTieringType#noTiering): The host has a DRAM tier
and a PMem tier, but the two are independent and unrelated. The PMem tier is
non-volatile and is exposed as an NVDIMM device. Applications can decide whether to
direct the reads and writes to DRAM or PMem by using the appropriate system call. The
DRAM tier will have the MemoryTierFlags#memoryTier flag and the PMem tier will
have the MemoryTierFlags#persistentTier flag.
- Memory mode (MemoryTieringType#hardwareTiering): The host has a DRAM tier
and a PMem tier, but the DRAM is hidden from applications and is just a cache
for the PMem main memory. The PMem tier is volatile, and is abstracted by the hardware
layer to look like traditional memory. Applications can read from/write to memory
using the traditional memory system calls. The memory controller in the hardware will
internally direct those to the DRAM cache first, and on a cache miss redirect them to
the PMem main memory. The DRAM tier will have the MemoryTierFlags#cachingTier
flag and the PMem tier will have the MemoryTierFlags#memoryTier flag.
Enum Constants
Name | Description |
cachingTier |
|
memoryTier |
|
persistentTier |
|
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