Can the chunklet size be changed?
Drive size flexibility – since RAID is striped at the chunklet level and not the entire disk different sized disks can be used. RAID flexibility – RAID levels can easily be changed.
What is set size and step size in 3PAR?
Set size is related to RAID level. Step size is how the data is mapped to the region. > Why 3PAR restrict maximum row size for RAID 1?
What is chunklet in 3PAR?
Physical Disks Every physical disk admitted into the 3PAR system is divided into 1 GB chunklets. A chunklet is the most basic component of data storage in the 3PAR Operating System. Chunklets are blocks of space and form the basis of the RAID sets.
What is set size in 3PAR?
Set size – The size of the RAID set. In this example the set size is 6+2 meaning 2 parity drives to every 6 data drives. Growth increment – The increment with which CPGs grow.
What is a chunklet?
A Chunklet is a 1GB piece (chunk) of any given physical disk within the array. It’s also a very funny word.
What is Tunesys?
The 3PAR CLI tunesys command analyzes the entire system and automatically corrects space usage imbalances in the system. Virtual volume and physical disk capacity are analyzed and re-balanced for optimal performance. Access to virtual volumes is not interrupted during system tuning operations.
What is a common provisioning group?
A common provisioning group (CPG) creates a virtual pool of logical disks that allows virtual volumes to share the CPG’s resources and allocates space on demand.
How does 3PAR storage work?
HPE 3PAR StoreServ Storage is a family of flash-optimized systems that offer rapid, and automated provisioning. It leverages a multi-tenant design, and uses hardware for deduplication. Furthermore, it does all this in a single, tier-1 storage system designed for data security, and availability.
What is Ld free?
LDFree is something which will come into use when all existing LD allocated space exausted. Any new space allocation 3PAR will do by taking space from LDFree or in case any other condition met for CPG growth. In your case we can see Free space shows 1005440 MB which is approx 1000GB or 1TB of space.
What is magazine in 3PAR?
‘cage means the CPG will survive cage failure port means port failure and magazine means. magazine failure.
What is compact CPG?
Compacting a CPG allows to reclaim space from a CPG that has become less efficient in space usage from creating, deleting, and relocating volumes. Compacting consolidates LD space in CPGs into as few LDs as possible.
What is CPG capacity?
A common provisioning group (CPG) is a virtual pool of logical disks that allows up to 64 volumes.
How big is a Chunklet in a 3PAR system?
Over time Chunklet mellowed out, he realised hey it’s good to share and instead of demanding a whole disk to himself he was happy with 1GB of any given disk. This is what happens in a 3PAR system, whenever a disk is added to the system it is divided into 1GB blocks of space called Chunklets.
How big is a disk in a 3PAR system?
This is what happens in a 3PAR system, whenever a disk is added to the system it is divided into 1GB blocks of space called Chunklets. Prior to the 7000 and 10,000 series the chunklet size was 256MB, the reason for the increase to 1GB was to reflect the growing size of disks.
How big is a chunklet of a physical disk?
A Chunklet is a 1GB piece (chunk) of any given physical disk within the array. It’s also a very funny word. A physical disk is…well, a physical disk. So there we have it – it being the very very very basic understanding of some of the terminology within the HP 3PAR.
Where are Chunklets located on a logical disk?
Chunklets are local to that physical disk only and cannot span to others. Logical disks are essentially a grouping of chunklets which are arranged as rows of like RAID sets. LD’s will ensure that each chunklet which resides in a RAID set is physically located on different physical disks.