The ClearCase Version Importer is a new feature of Rational Team Concert 4.0.5. It can migrate all the versions in any branches in Rational ClearCase in a single operation, and the version branching is also replicated in Rational Team Concert source control. This document provides performance data that you can refer to.
The performance result gives you can idea about how long it takes to import files and folders using the importer, although this example is not a benchmark. Your performance also varies with the speed of the server host, database type, and the client host that you use.
The performance report of 4.0.5 release is available at
ClearCase Version Importer Performance Report in Rational Team Concert 4.0.5. This document also provides some considerations to migrate the data efficiently.
For more information about the ClearCase Version Importer, see
Migrating data with the ClearCase Version Importer.
Topology
In this test environment, all the softwares are installed and configured on a single host except for ClearCase Servers. The Version Importer commands are run on the same host as well. Here is the single server topology variables.
Metadata Variable |
Value |
ClearCase Client Version |
8.0.1.2 |
Application Server |
Tomcat 7 (3GB max heap) |
CPU |
Intel Core i7-2600 CPU @ 3.4GHz (8-core) |
Database Management System |
DB2 10.1 |
License Management System |
Trial |
Memory |
8GB |
Network |
100Mbps Ethernet |
Operating System |
Windows 7 64bit |
Other technologies |
None |
User Management System |
Tomcat |
Methodology
The export command of the Version Importer is run against the sub-folders of VOBs listed in the result table, and duration of the command is measured.
Then, the intermediate data is imported to a new component of a new stream on the local CCM server, and the duration of the command is measured. The user mapping is not configured.
Results
Note: The table shows an average time to import or export per version. The number varies by test case because there are several other factors that contribute to the duration (such as cleartext pool cache or the number of files and directories in single Rational Team Concert component).
Single view migration
Folder Name |
# of Elements (Folders/Symbolic Links/Files) |
# of File versions |
Export Duration (in seconds) |
Average Export time per version in seconds |
Import Duration (in seconds) |
Average Import time per version in seconds |
\atria\lib\tbs |
85 |
(0/3/82) |
10,709 |
1h00m |
(3,616s) |
0.34 |
32m |
(1,920s) |
0.18 |
\applets\ucc |
3,277 |
(589/40/2,598) |
120,161 |
10h06m |
(36,360s) |
0.30 |
7h38m |
(27,480s) |
0.23 |
\Java\Windows |
16,230 |
(2,282/1/13,947) |
27,920 |
11h06m |
(39,960s) |
1.43 |
54m |
(3,240s) |
0.12 |
\Java\HPUX |
18,340 |
(1,925/89/16,326) |
32,722 |
14h24m |
(51,840) |
1.58 |
1h26m |
(5,160s) |
0.16 |
\design |
31,922 |
(3,880/341/27,701) |
110,649 |
110h51m |
(399,060s) |
3.6 |
14h54m |
(53,640s) |
0.48 |
Multiple view migration
Folder Name |
# of views |
# of Elements (Folders/Symbolic Links/Files) |
# of File versions |
Export Duration |
Average Export time per version in seconds |
Import Duration |
Average Import time per version in seconds |
\nucor\client |
1 |
4,769 |
(651/25/4093) |
158,063 |
22h20m |
0.51 |
11h05m |
0.25 |
\nucor\client |
3 |
6,126 |
(1,953/75/4,098) |
156,525 |
36h07m |
0.83 |
17h51m |
0.41 |