Tag: partition

Q: On “show ns partition” output, we sometimes see partition ID assignment is not sequential / IDs getting skipped. Is this a problem ?

A:Subject to memory availability one can create up to 511 admin partitions manually.

A partition ID is assigned to each partition upon creation and is used for internal tracking (this is not a user defined parameter).

Partition IDs are assigned from 1 to 511, however if there is an error (for any reason) during partition creation or a partition is deleted then partitioned will be skipped, these are reused later once 511 is reached.

Example:

Add partition parta … success | partition:ID1

Add partition partb … success | partition:ID2

Add partition partc… failed | partition:ID3 (Skipped)

Add partition partd… success | partition:ID4

//Assume the one below is 510th partition created it will be assigned partitionID:511

Add partition partx success | partitionID:511

//So, the actual 511th partition will now be assigned partitionID:3 as that was skipped previously

Add partition party .. will be assigned partitionID3

Q: Do these skipped partition IDs have any resource consumption until freed / reused.

A:Resources are only consumed by active partitions, skipped partition IDs do not have any bearing on resource consumption.

Example:

==

In the following output partitionID 1 to 30 and 34 is skipped (for any reason)

> show ns partition

1) Name: a

Partition ID: 31

Max BW : 10240 Kbps

Max Conn :1024 Max Mem: 700 MB

2) Name: b

Partition ID: 32

Max BW : 10240 Kbps

Max Conn :1024 Max Mem: 700 MB

3) Name: c

Partition ID: 33

Max BW : 10240 Kbps

Max Conn :1024 Max Mem: 700 MB

4) Name: d

Partition ID: 35

Max BW : 10240 Kbps

Max Conn :1024 Max Mem: 5 MB

Done

>

Now if you check using nsconmsg you can see memory use is only by the active partitions, no memory is in use for skipped partition IDs (1-30 or 34)

> shell

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root@ns# nsconmsg -d finalstatswt0 -K /var/nslog/newnslog -g mem_cur_usedsize | grep partition

3 0 3193912 mem_cur_usedsize partition_ctx(a) (PART-31)

5 0 3193912 mem_cur_usedsize partition_ctx(b) (PART-32)

7 0 3193912 mem_cur_usedsize partition_ctx(c) (PART-33)

9 0 3193912 mem_cur_usedsize partition_ctx(d) (PART-35)

root@ns#