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What is SIDL

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cloud-volumes-ontap-cvo
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Applies to

  • Cloud Volumes ONTAP (CVO)
  • BlueXP
  • ONTAP Select

Answer

SIDL(Single Instance data logging) is an ONTAP write modewhich improves ONTAP write efficiency on virtualized environments (CVO, ONTAPselect, etc..). SIDL writes differ from normal ONTAP writes in some key ways:

  1. SIDL writes commit user data to filesystem disks before updating the NVLOG.
  2. SIDL writes do NOT NVLOG user data. Instead, they NVLOG header information that points to disk blocks which contain the write data.

SIDL  can bring substantial benefits when running on CVO systems.

For example:

  • It offloads a substantial portion of the MB/s load from the vNVRAM backing device.
  • It reduces the total MB/s network load between HA-partners.

    Additional Information

    NetApp provides no representations or warranties regarding the accuracy or reliability or serviceability of any information or recommendations provided in this publication or with respect to any results that may be obtained by the use of the information or observance of any recommendations provided herein. The information in this document is distributed AS IS and the use of this information or the implementation of any recommendations or techniques herein is a customer's responsibility and depends on the customer's ability to evaluate and integrate them into the customer's operational environment. This document and the information contained herein may be used solely in connection with the NetApp products discussed in this document.