Database Reference
In-Depth Information
1
300 requests
900 requests
1500 requests
2100 requests
2700 requests
3300 requests
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
10
2
10
3
10
4
10
5
10
6
Connection Time on Client Side (Milliseconds)
Fig. 4.6
The cumulative distribution function of high stress round-trip between the end-user and
the Google App Engine cloud hosting servers
300
App Engine Datastore
Azure Table Storage
Amazon Blob Storage
Amazon LocalDB
Amazon SimpleDB
Amazon S3
250
200
150
100
50
0
1 Byte
100 Bytes
1 KB
1 MB
Data Size
Fig. 4.7
The average read time in cloud databases with low stress database read test set
Low Stress Database Read and Write
In Fig.
4.7
, the average database processing time of reading 1 byte, 100 bytes, and
1 kB are within 50 ms, while the database processing time of writing small size data
in Fig.
4.8
varies from 10 ms to 120 ms. From this, it is obvious that for each cloud
database, the reading performance is faster than the writing performance for the
same amount of data. The two figures also state that the local database in Amazon
EC2 instance shows its strength for message sizes that ranges from 1 byte to 1 kB.
