Daiwa Odakyu Construction Co., Ltd.
Problem
Daiwa Odakyu Construction Co., Ltd did back up of 15 Servers every day using Symantec Backup Exec. But the problem of latency of backup appeared. Initially the system was designed to finish backup within 3 hours at most. But the time grew to 8 hours. They thought additional hardware was needed but had no additional budget. At that time they discovered the cause of latency was fragmentation. First they tried to solve fragments with the built-in defrag. But it solved only 20%. Next a free defrag software was tried. It proceeded to 35% and shortened backup time by more than 1 hour. But 2 days after, the backup time got back to 8 hours.
Solution
Mr. Kawata, manager of the Information System Group of Daiwa Odakyu, found Diskeeper® via the internet and downloaded trialware from SOHEI. Diskeeper solved all fragmentation and shortened the backup times down to 1.3 hours. What’s more, IntelliWrite® prevented fragmentation up to 99%! In accordance with their trial, the system without Diskeeper added 1 hour a day to their backup times.
|
|
Back up Time(hour) |
Number of Fragments |
Number of fragments prevented |
| Initial design |
3.0 |
- |
- |
| Fragmented |
8.5 |
10,000,000以上 |
- |
| After defrag by Diskeeper |
1.3 |
250 |
3,000,000～7,200,000 |
| Improvement |
85% |
99.9975% |
（断片化防止率99％） |
“I couldn’t estimate such a big influence of fragmentation in the 50% used volume. The incredible power of Diskeeper is surprising me. The massive fragmentation I gave up trying to solve is now easily defragmented and prevented by Diskeeper, and then this leads to prevent latency of back up completely.
“The trial without Diskeeper, which resulted in adding 1 hour a day to backup time, scared me so much. With increasing numbers of files, the backup caused massive fragmentation and gets into a dangerous situation. Less than $1,000 investment in Diskeeper is equal to more than $10,000 worth of Servers. I think Diskeeper is vital for file servers and backup servers."
“I’m thankful to the developers of this surprising software.”
System:
HP DL380G4 Xeon E5430 4GB Memory 410GB SAS RAID10(146GB SA*6）
HP StorageWorks MSA60 3.41TB SATA RAID10(750GB SATA*10）