11 Replies Latest reply on Oct 24, 2013 12:18 PM by ssei

    Maximum LEM volume size?


      What is the maximum size I can increase my LEM volume to for maximizing my log data retention?

        • Re: Maximum LEM volume size?

          great question.  I'm about to face the same.  Also, what are the system recommendations for proc/RAM for more data if any?

          • Re: Maximum LEM volume size?

            Prior to LEM version 5.6, the limit was 1TB. With version 5.6, the 1TB limit has been removed. The new limit is 2.2TB, which is the next most common barrier is 2.2TB, based on virtual infrastructure capabilities to address a single disk. This is according to http://thwack.solarwinds.com/community/solarwinds-community/product-blog/blog?start=45.

              • Re: Maximum LEM volume size?

                Dang, I new there was a blog that covered that but I wasn't able to find it before asking the question here.  Thanks for pointing that out!

                • Re: Maximum LEM volume size?

                  So, after thinking about this I have a follow-up question...


                  What if you need to store more than 2.2TB worth of data to meet a data retention requirement?

                    • Re: Maximum LEM volume size?

                      Here's an example related to PCI. PCI requires 90 days of logs online, with 365 available offline. In this scenario, make sure that you have a DB size that allows the 90 days to be online, plus a buffer, just to be sure. Then save your backups to have the 365 days offline available. In your question, you didn't elaborate on what your data retention requirements are, but this is an example.


                      If you have your DB size maxed out and still don't have enough room for your *online* data retention requirement, then you'll have to look at a couple of things. I would recommend exploring every option available to make certain that you're only logging what needs to be logged. Examine your Windows audit policy for instance (if you're in a Windows environment). As you probably know, one checkbox there can make a considerable difference in the number of events that get sent to LEM.


                      The only option I know of that would help you past the 2.2TB limit would be another complete LEM system. Then you would have some systems logging to one, and others logging to another. In your LEM console, you would be able to easily switch between the two LEM 'environments'. As I understand it, nDepth queries can be used to run against either DB, but filters can show traffic from both LEM systems simultaneously. I could be mistaken on those specific details.

                        • Re: Maximum LEM volume size?

                          Thanks, that is along the lines of what I was expecting.  I am curious though, my understanding is that if you need to use one of those backups; when you restore it you will replace your current database with the backup, is that correct?

                          • Re: Maximum LEM volume size?

                            When you say 90 days online.  Your are referring to being able to query results via ndepth for up to 90 days correct?  For someone also in the PCI realm.  I would be interested in some of the industry standard best practices that others are leveraging with LEM.  We currently do a monthly archiveconfig, and weekly backupconfigs and logbackupconfigs.


                            It would also be helpful for an actual list of audit policies to enable, this being my first time at the rodeo regarding PCI.  For example they say Object Access "Success and Failure".  But are they all enabled? I don't really want to turn on audit filtering platform connection..etc and have our logs explode.  Any guidance is appreciated.  Thanks

                              • Re: Maximum LEM volume size?

                                What are the recommended Audit Policy settings for Windows when implementing logging for the PCI DSS or other security standard?


                                Here is what I found and what I have set based on this:


                                Category/Subcategory                      Setting


                                  Security System Extension               No Auditing

                                  System Integrity                        Success and Failure

                                  IPsec Driver                            No Auditing

                                  Other System Events                     No Auditing

                                  Security State Change                   Success and Failure


                                  Logon                                   Success and Failure

                                  Logoff                                  Success and Failure

                                  Account Lockout                         Success and Failure

                                  IPsec Main Mode                         No Auditing

                                  IPsec Quick Mode                        No Auditing

                                  IPsec Extended Mode                     No Auditing

                                  Special Logon                           Success and Failure

                                  Other Logon/Logoff Events               Success and Failure

                                  Network Policy Server                   No Auditing

                                Object Access

                                  File System                             Success and Failure

                                  Registry                                Success and Failure

                                  Kernel Object                           No Auditing

                                  SAM                                     No Auditing

                                  Certification Services                  No Auditing

                                  Application Generated                   No Auditing

                                  Handle Manipulation                     No Auditing

                                  File Share                              Success and Failure

                                  Filtering Platform Packet Drop          No Auditing

                                  Filtering Platform Connection           No Auditing

                                  Other Object Access Events              No Auditing

                                  Detailed File Share                     No Auditing

                                Privilege Use

                                  Sensitive Privilege Use                 Failure

                                  Non Sensitive Privilege Use             No Auditing

                                  Other Privilege Use Events              No Auditing

                                Detailed Tracking

                                  Process Termination                     No Auditing

                                  DPAPI Activity                          No Auditing

                                  RPC Events                              No Auditing

                                  Process Creation                        No Auditing

                                Policy Change

                                  Audit Policy Change                     Success and Failure

                                  Authentication Policy Change            Success and Failure

                                  Authorization Policy Change             Success and Failure

                                  MPSSVC Rule-Level Policy Change         Success and Failure

                                  Filtering Platform Policy Change        Success and Failure

                                  Other Policy Change Events              Success and Failure

                                Account Management

                                  User Account Management                 Success and Failure

                                  Computer Account Management             Success and Failure

                                  Security Group Management               Success and Failure

                                  Distribution Group Management           Success and Failure

                                  Application Group Management            Success and Failure

                                  Other Account Management Events         Success and Failure

                                DS Access

                                  Directory Service Changes               No Auditing

                                  Directory Service Replication           No Auditing

                                  Detailed Directory Service Replication  No Auditing

                                  Directory Service Access                Failure

                                Account Logon

                                  Kerberos Service Ticket Operations      Success and Failure

                                  Other Account Logon Events              Success and Failure

                                  Kerberos Authentication Service         Success and Failure

                                  Credential Validation                   Success and Failure


                                Off topic but just wanted to compare with some others.  Anyone?

                                • Re: Maximum LEM volume size?

                                  Yes, for the 90 days, I was referring to an nDepth search. I would also recommend against auditing the "audit filtering platform", "Detailed File Share", or the "Directory Service Access". These all log copiously, and have (arguably) little security value.