Out-of-order writes with NFS

Content Platform Tenant Management Help

Version
9.7.x
File Size
4269 KB
Audience
anonymous
Part Number
MK-95HCPH002-19

NFS can write the data for an object out of order. If HCP receives an out-of-order write for a large file (200,000 bytes or larger), it discards the cryptographic hash value it already calculated. The object then has no hash value until either of these occurs:

  • HCP returns to the object at a later time and calculates the hash value for it.
  • A user or application opens or downloads the hash.txt metafile for the object, which causes HCP to calculate the hash value. However, because HCP calculates this value asynchronously, the value may not be immediately available. This is particularly true for large objects.