Tier relocation log file contents

In every cycle in which tier relocation is performed, information about each pool and V-VOL is exported to the tier relocation log. The time required to incorporate the latest tier relocation results can be approximately 30 minutes. The tier relocation log file is tab-delimited and contains the following information.

Item

Does each pool output the log information?

Does each V-VOL output the log information?

Type of information

Description

Cycle ID

Yes

Yes

Common

ID of each cycle of a tier relocation.

A common ID is allocated to pool logs and V-VOL logs that are collected in one cycle.

Log Format Version

Yes

Yes

Common

Version number of the tier relocation log format.

DKC Serial Number

Yes

Yes

Common

Serial number of the storage system.

Log Type

Yes

Yes

Common

The following log types are displayed.

POOL: Log information of each pool.

V-VOL: Log information of each V-VOL.

LDEV ID

No

Yes

Common

LDEV ID of a V-VOL exported to a log.

Pool ID

Yes

Yes

Common

Pool ID of a pool exported to a log.

Num of V-VOLs

Yes

No

Common

The number of V-VOLs to be processed when tier relocation is performed.

Tiering Policy

No

Yes

Tier relocation result

Value of the tiering policy. Values from All(0) to Level31(31) can be displayed.

Tier1 Total

Yes

No

Capacity information

Total pages of tier 1.

Tier2 Total

Yes

No

Capacity information

Total pages of tier 2.

Tier3 Total

Yes

No

Capacity information

Total pages of tier 3.

Tier1 Used

Yes

Yes

Capacity information

Pages assigned to tier 1 at the start of tier relocation.

Tier2 Used

Yes

Yes

Capacity information

Pages assigned to tier 2 at the start of tier relocation.

Tier3 Used

Yes

Yes

Capacity information

Pages assigned to tier 3 at the start of tier relocation.

Start Relocation Date

Yes

Yes1

Common

Starting date of the tier relocation.

Start Relocation Time

Yes

Yes1

Common

Starting time of the tier relocation.

End Relocation Date

Yes

Yes1

Common

Ending date of the tier relocation.

End Relocation Time

Yes

Yes1

Common

Ending time of the tier relocation.

Result Status

Yes

Yes1

Tier relocation result

Statuses of a tier relocation.

Normal End: A tier relocation ended normally.

Suspend: A tier relocation suspended.

Detail Status

Yes

Yes1

Tier relocation result

If the Result Status is Suspend, one of the following reasons is displayed.

Monitor discarded: Suspended due to the discard of monitoring data.

End of cycle: Suspended due to incomplete tier relocation during a monitoring cycle.

Requested by user: Suspended due to request by a user.2

Threshold exceeded: Suspended because the used capacity of pools reaches a threshold due to a tier relocation. When the pool is almost full, this reason is logged.

FMC threshold exceeded: Suspended because the used capacity of the physical capacity in the accelerated compression FMC parity group in the pool, reaches a full of the capacity.

Cache blocked: Suspended because a cache memory is blocked.

Volume blocked: Suspended because an LDEV which is pool-VOL or V-VOL is blocked.

The tier management changed (Auto/Manual): Suspended because the tier management mode is changed from Auto to Manual, or Manual to Auto.

Other reasons: Suspended for reasons other than the above, such as:

  • A V-VOL was specified as the secondary volume of the TrueCopy pair and an initial copy operation was performed.

  • A V-VOL was specified as the secondary volume of the global-active device pair, and an initial copy operation was performed.

  • A V-VOL was specified as the secondary volume of the Universal Replicator pair, and an initial copy operation was performed.

Completed Rate (%)

Yes

Yes

Tier relocation result

Progress percentage rate at the time tier relocation ends or is suspended.

Remediation Rate (%)

Yes

Yes

Tier relocation result

IOPH (I/O per hour) remediation rate at the time tier relocation ends or is suspended.

The remediation rate = ((Total IOPH of pages after the promotion1) / (Total IOPH of all pages to be performed of promotion1)) * 100

1: Promotion is the page migration from a lower to higher tier.

Planned Tier1->Tier2

Yes

Yes

Tier relocation

Number of pages that are planned to move from the tier 1 to tier 2.

Planned Tier1->Tier3

Yes

Yes

Tier relocation

Number of pages that are planned to move from the tier 1 to tier 3.

Planned Tier2->Tier1

Yes

Yes

Tier relocation

Number of pages that are planned to move from the tier 2 to tier 1.

Planned Tier2->Tier3

Yes

Yes

Tier relocation

Number of pages that are planned to move from the tier 2 to tier 3.

Planned Tier3->Tier1

Yes

Yes

Tier relocation

Number of pages that are planned to move from the tier 3 to tier 1.

Planned Tier3->Tier2

Yes

Yes

Tier relocation

Number of pages that are planned to move from the tier 3 to tier 2.

Moved Tier1->Tier2

Yes

Yes

Tier relocation

Number of pages that are moved from the tier 1 to tier 2.

Moved Tier1->Tier3

Yes

Yes

Tier relocation

Number of pages that are moved from the tier 1 to tier 3.

Moved Tier2->Tier1

Yes

Yes

Tier relocation

Number of pages that are moved from the tier 2 to tier 1.

Moved Tier2->Tier3

Yes

Yes

Tier relocation

Number of pages that are moved from the tier 2 to tier 3.

Moved Tier3->Tier1

Yes

Yes

Tier relocation

Number of pages that are moved from the tier 3 to tier 1.

Moved Tier3->Tier2

Yes

Yes

Tier relocation

Number of pages that are moved from the tier 3 to tier 2.

IOPH

Yes

Yes

Monitoring result

IOPHs of all pools or V-VOLs.

IOPH Tier1 (%)

Yes

Yes

Monitoring result

Percentage of IOPH for tier 1.

IOPH Tier2 (%)

Yes

Yes

Monitoring result

Percentage of IOPH for tier 2.

IOPH Tier3 (%)

Yes

Yes

Monitoring result

Percentage of IOPH for tier 3.

Performance Util Tier1 (%)

Yes

No

Monitoring result

Performance utilization of tier 1. The performance utilization is the current I/O percentage based on the maximum performance of tier 1.

Performance Util Tier2 (%)

Yes

No

Monitoring result

Performance utilization of tier 2. The performance utilization is the current I/O percentage based on the maximum performance of tier 2.

Performance Util Tier3 (%)

Yes

No

Monitoring result

Performance utilization of tier 3. The performance utilization is the current I/O percentage based on the maximum performance of tier 3.

Tier1 Low Range

No

Yes

Monitoring result

Lower limit in a range for tier 1.

Tier2 High Range

No

Yes

Monitoring result

Higher limit in a range for tier 2.

Tier2 Low Range

No

Yes

Monitoring result

Lower limit in a range for tier 2.

Tier3 High Range

No

Yes

Monitoring result

Higher limit in a range for tier 3.

Reclaim Zero Page Num

Yes

Yes

Tier relocation

Number of pages processed in an operation to reclaim zero pages.

Non-Compliant Tiering Policy Number

Yes

No

Monitoring result

Number of a tiering policy that does not conform to the current tier configuration. A non-compliant policy prevents tier relocation.

Realtime Moved Tier2->Tier1 (Unplanned)

Yes

Yes

Tier relocation

Number of pages moved from tier 2 to tier 1 by active flash, during the performing of the tier relocation by Dynamic Tiering. However, the pages migration is not planned by Dynamic Tiering.

Realtime Moved Tier3->Tier1 (Unplanned)

Yes

Yes

Tier relocation

Number of pages moved from tier 3 to tier 1 by active flash, during the performing of the tier relocation by Dynamic Tiering. However, the pages migration is not planned by Dynamic Tiering.

Realtime Moved Tier2->Tier1 (Planned)

Yes

Yes

Tier relocation

Number of pages moved from tier 2 to tier 1 by active flash, during the performing of the tier relocation by Dynamic Tiering. And the pages migration is planned by Dynamic Tiering.

Realtime Moved Tier3->Tier1 (Planned)

Yes

Yes

Tier relocation

Number of pages moved from tier 3 to tier 1 by active flash, during the performing of the tier relocation by Dynamic Tiering. And the pages migration is planned by Dynamic Tiering.

Realtime Moved Tier1->Tier2

Yes

Yes

Tier relocation

Number of pages moved from tier 1 to tier 2 by active flash, during the performing of the tier relocation for Dynamic Tiering.

Realtime Moved Tier1->Tier3

Yes

Yes

Tier relocation

Number of pages moved from tier 1 to tier 3 by active flash, during the performing of the tier relocation for Dynamic Tiering.

Realtime Moved Tier2->Tier1 (Non Compliant)

Yes

Yes

Tier relocation

In the total pages moved from tier 2 to tier 1 by active flash, the number of the migrated pages that are not conformed with the plan of Dynamic Tiering page migration appears.

Realtime Moved Tier3->Tier1 (Non Compliant)

Yes

Yes

Tier relocation

In the total pages moved from tier 3 to tier 1 by active flash, the number of the migrated pages that are not conformed with the plan of Dynamic Tiering page migration appears.

Realtime Moved Tier1->Tier2 (Non Compliant)

Yes

Yes

Tier relocation

In the total pages moved from tier 1 to tier 2 by active flash, the number of the migrated pages that are not conformed with the plan of Dynamic Tiering page migration appears.

Realtime Moved Tier1->Tier3 (Non Compliant)

Yes

Yes

Tier relocation

In the total pages moved from tier 1 to tier 3 by active flash, the number of the migrated pages that are not conformed with the plan of Dynamic Tiering page migration appears.

Note

  1. If the log file is lfv2 (Log Format Version 2) or later, the log file information of each V-VOL appears. If the log file is lfv 1, a hyphen appears.

  1. If pool-VOLs are deleted, valid monitoring information is simultaneously discarded. Therefore, the tier relocation is interrupted. In this case, after pool-VOLs are deleted, the tier determination calculation is executed again and valid monitor information is re-created.