Ducky,Originally Posted by DuckieHo
ReFS write speeds are terrible....
Storage Spaces also is not as expandable as it may appear.... you basically get locked into performance based on the initial configuration.
ReFS can be drastically speed up if you get a SSD RAID1 for journaling.Originally Posted by coachmark2
ZFS when used with FreeNAS/NAS4Free also has abysmal write speeds. Is there a "next-gen" file system that can detect corruption and works reliably that doesn't throw performance into the toilet?
Depends.... do you need fast writes?Originally Posted by coachmark2
I see. So you would setup a storage pool like so?
2 x 128GB SSD
6 x 4TB HDD
And put that all in a Storage Spaces parity setup?
Let's assume that random I/O is the more important metric and that sequential needs only be decent (100MB/s+). Will Storage Spaces automatically detect the drive types and optimize storage appropriately? Or is that something that must be configured by the storage administrator?Originally Posted by DuckieHo
Depends.... do you need fast writes?
I also forget that R2 has tiered storage as well.
Important: look at the "columns" concept. It's permanent based on initial setup: http://social.technet.microsoft.com/wiki/contents/articles/15200.storage-spaces-designing-for-performance.aspx
If you need random I/O and sequential over 100MB/s.... then parity alone is definitely not what you want.Originally Posted by coachmark2
Let's assume that random I/O is the more important metric and that sequential needs only be decent (100MB/s+). Will Storage Spaces automatically detect the drive types and optimize storage appropriately? Or is that something that must be configured by the storage administrator?
Good article by the way.
Of course, there's an algorithm that manages the tiering when in use. You don't want full automation in configuration though. You don't want to plug a drive in and the OS decides what to do with it.Originally Posted by coachmark2
Storage Tiering, the practice of moving frequently accessed data to very fast storage, while maintaining infrequently accessed data on moderate or slow storage is supported with Storage Spaces starting in Windows Server 2012 R2. Frequency of access (heat) on files is measured by the file system and fed into a tiering engine that instructs Spaces to move often used files to flash-based storage devices, while retaining cold data on large-capacity, slow storage. The major benefit is a significant increase in cost efficiency, as only the critical workload is accelerated by the flash-based storage, yet the majority of data stored can remain on slow, large-capacity devices (for example, 7,200 RPM 4TB HDDs).