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Solution
Possible causes
Symptom
None
The compression ratio depends on
the amount of data changed
between the backup sets. In addi-
tion, not all data is deduplicated.
For example, files less than 32 KB
in size and backup sets less than 1
MB are ignored. If your data sets
do not change significantly
between backups, or if they contain
many small files, the compression
ratio may be low. This is expected
behavior and does not indicate a
problem.
The deduplication compression ra-
tio is low.
In time, the ratio will improve as
more backup sets are deduplicated.
After 50 versions of a backup set
have been deduplicated, the VLS
automatically restarts the deduplic-
ation process as though starting
from scratch. As a result, the com-
pression ratio will drop.
The deduplication compression ra-
tio was fine, but suddenly went
down significantly.
After 50 versions of a backup set
have been deduplicated, the VLS
automatically restarts the deduplic-
ation process as though from
scratch. The restore performance
will then improve because the re-
store versions are more recent.
The restore performance will contin-
ue to degrade as you restore older
and older versions of a backup.
The restore performance is degrad-
ing.
Troubleshooting
320
Содержание StorageWorks 6000 - Virtual Library System
Страница 26: ...Introduction 26 ...
Страница 70: ...Storage Configuration 70 ...
Страница 116: ...Automigration Replication 116 ...
Страница 132: ...Operation 132 ...
Страница 140: ...User Interfaces 140 ...
Страница 178: ...Management 178 ...
Страница 256: ...Component Identification 256 ...
Страница 300: ...Component Replacement 300 ...
Страница 310: ...Support and Other Resources 310 ...
Страница 326: ...Specifications 326 ...
Страница 332: ...French Laser Notice German Laser Notice Italian Laser Notice Regulatory Compliance Notices 332 ...
Страница 333: ...Japanese Laser Notice Spanish Laser Notice Recycling Notices English Notice HP StorageWorks 333 ...
Страница 334: ...Bulgarian Notice Czech Notice Danish Notice Dutch Notice Regulatory Compliance Notices 334 ...
Страница 335: ...Estonian Notice Finnish Notice French Notice German Notice HP StorageWorks 335 ...
Страница 336: ...Greek Notice Hungarian Notice Italian Notice Latvian Notice Regulatory Compliance Notices 336 ...
Страница 337: ...Lithuanian Notice Polish Notice Portuguese Notice Romanian Notice HP StorageWorks 337 ...
Страница 339: ...Battery Replacement Notices Dutch Battery Notice HP StorageWorks 339 ...
Страница 340: ...French Battery Notice German Battery Notice Regulatory Compliance Notices 340 ...
Страница 341: ...Italian Battery Notice Japanese Battery Notice HP StorageWorks 341 ...
Страница 342: ...Spanish Battery Notice Regulatory Compliance Notices 342 ...
Страница 348: ...Glossary 348 ...
Страница 358: ...358 ...