topic VTL Post Process Deduplication in Data Protection https://community.netapp.com/t5/Data-Protection/VTL-Post-Process-Deduplication/m-p/68898#M9357 <HTML><HEAD></HEAD><BODY><P>Greetings and salutations. Does anyone out there have any experiences to share regarding situations where you have had issues with getting the post process completed? I am seeing that at around 70-75% of capacity, we start seeing warnings of space usage. At about 80-85% the VTL will start behaving erratically, like take the drives offline in an attempt to self-preserve. If we fill up space too fast, it can't catch up on the post process, and we have to essentially stop all backups and restores to let it finish uninterrupted. I also wondered how this VTL handles cleanup of expired, re-labled volumes. There is no indication that that is happening, like you see with volumes actually having been written to, and seen in the post process job. I also have seen that if the post process job does not finish in the window, the FSB job will not kick off to reflect any savings from the dedup process. I also think I have observed the following caveat - if you want to run backups or restores during your post process window, then out-of-band dedup is not the right product to get. Any comments out there are greatly appreciated.</P></BODY></HTML> Thu, 05 Jun 2025 07:12:55 GMT bruce_breidall 2025-06-05T07:12:55Z VTL Post Process Deduplication https://community.netapp.com/t5/Data-Protection/VTL-Post-Process-Deduplication/m-p/68898#M9357 <HTML><HEAD></HEAD><BODY><P>Greetings and salutations. Does anyone out there have any experiences to share regarding situations where you have had issues with getting the post process completed? I am seeing that at around 70-75% of capacity, we start seeing warnings of space usage. At about 80-85% the VTL will start behaving erratically, like take the drives offline in an attempt to self-preserve. If we fill up space too fast, it can't catch up on the post process, and we have to essentially stop all backups and restores to let it finish uninterrupted. I also wondered how this VTL handles cleanup of expired, re-labled volumes. There is no indication that that is happening, like you see with volumes actually having been written to, and seen in the post process job. I also have seen that if the post process job does not finish in the window, the FSB job will not kick off to reflect any savings from the dedup process. I also think I have observed the following caveat - if you want to run backups or restores during your post process window, then out-of-band dedup is not the right product to get. Any comments out there are greatly appreciated.</P></BODY></HTML> Thu, 05 Jun 2025 07:12:55 GMT https://community.netapp.com/t5/Data-Protection/VTL-Post-Process-Deduplication/m-p/68898#M9357 bruce_breidall 2025-06-05T07:12:55Z Re: VTL Post Process Deduplication https://community.netapp.com/t5/Data-Protection/VTL-Post-Process-Deduplication/m-p/68903#M9358 <HTML><HEAD></HEAD><BODY><P>Bruce,</P><P></P><P>as you possibly know, VTL &amp; DeDup is a sensitive topic. I strongly recommend you to get in touch with NetApp professional service regarding your issues and a possible solution. </P></BODY></HTML> Thu, 01 Jul 2010 19:25:24 GMT https://community.netapp.com/t5/Data-Protection/VTL-Post-Process-Deduplication/m-p/68903#M9358 thomas_glodde 2010-07-01T19:25:24Z Re: VTL Post Process Deduplication https://community.netapp.com/t5/Data-Protection/VTL-Post-Process-Deduplication/m-p/68908#M9359 <HTML><HEAD></HEAD><BODY><P>Sensitive is an undestatement. How about criminal, would that be a better word?</P><P></P><P>I have cases open, but get very little or no quality help, which is why I am trying this forum. Thanks for your response.</P></BODY></HTML> Thu, 01 Jul 2010 20:14:55 GMT https://community.netapp.com/t5/Data-Protection/VTL-Post-Process-Deduplication/m-p/68908#M9359 bruce_breidall 2010-07-01T20:14:55Z Re: VTL Post Process Deduplication https://community.netapp.com/t5/Data-Protection/VTL-Post-Process-Deduplication/m-p/68913#M9360 <HTML><HEAD></HEAD><BODY><P>NetApps product policy is none of my concern to discuss here.</P><P></P><P>I recommend you to escalate these things with your favorite NetApp sales representative instead of customer support only. </P></BODY></HTML> Fri, 02 Jul 2010 11:52:34 GMT https://community.netapp.com/t5/Data-Protection/VTL-Post-Process-Deduplication/m-p/68913#M9360 thomas_glodde 2010-07-02T11:52:34Z