I am still playing around with load/stress testing my FDS install.  I am using slamd to run the tests, and I am running the basic load, and the basic search tests against my test boxes,  The slamd client and the FDS server are on identical hardware running RHEL4 with 2G memory, and 2 Intel Xeon 3.6GHz processors.  The issue I am seeing is that I am getting "cannot connect to the ldap server" errors once I push the "threads per client" past 2400.  My question is am I hitting a limit on the OS (max tcp connections)? Or a FDS limit?  My assumption was that given appropriate hardware, and proper configuration, I could expect FDS to handle more than 2400 concurrent connections.  Any insights as to what I might be missing would be greatly appreciated.

Thanks


FDS Config:

Performance settings are:
Time Limit: 3600
Max file descriptors: 65535

Database Link Connection Management Settings
Max TCP connections: 6
Bind Timeout: 15
Max binds per conn: 20
Timeout before Abandon: 1
Max LDAP Conn:  40
Max bind retries: 6
Max operations/conn: 2

Database Settings:
Max Cache Size:  66060288
Mem Avail for cache: 105622733

Note:  uidnumber is indexed


SLAMD test parameters:

Scheduled Start Time             06/05/2007 13:10:46    
Scheduled Stop Time              (not specified)        
Scheduled Duration               300 seconds    
Number of Clients                1      
Wait for Available Clients               true   
Monitor Clients if Available             false  
Threads per Client               2400   
Thread Startup Delay             0 milliseconds 
Statistics Collection Interval           60 seconds     
Job Dependencies                 (none specified)
       

Notify on Completion             (none specified)       
        
Parameter Information   
Directory Server Host            app2   
Directory Server Port            389    
Bind DN          (not specified)        
Bind Password            (not specified)        
Search Base              dc=calpers,dc=ca,dc=gov        
Search Scope             Whole Subtree  
Search Filter            uidnumber=50000        
Filter File URL          (not specified)        
Attributes to Return             uidnumber      
Warm Up Time             0      
Cool Down Time           0      
Search Size Limit                0      
Search Time Limit                0      
Time Between Requests (ms)               0      
Use SSL          false  
Blindly Trust Any Certificate            true   
SSL Key Store            (not specified)        
SSL Key Store Password           (not specified)        
SSL Trust Store          (not specified)        
SSL Trust Store Password                 (not specified)        
Number of Iterations             -1     
Always Disconnect                false  
Follow Referrals                 false 


 

Cary Anderson, Systems Software Specialist
UNIX/Linux Services

Information Technology Services Branch
Technology Services & Support Division / Data Center Section

System Software & Storage Infrastructure
fCalPERS
Phone: (916) 795-2588
 
Fax: (916) 795-2424