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public:8004_faq:how_to_run_a_data_integrity_check [2020/03/20 11:38]
yuk.cheng
public:8004_faq:how_to_run_a_data_integrity_check [2021/12/07 09:55] (current)
anna.olalia
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-=====  FAQ: How to run a Data Integrity Check for backup data stored in backup destination? ​ =====+===== [V8] FAQ: How to run a Data Integrity Check for backup data stored in backup destination? ​ =====
  
 <​html>​ <​html>​
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   Reviewed:   Reviewed:
  </​b>​  </​b>​
- 20/03/2020+ 2021-03-03
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  </​b>​  </​b>​
  <​br/>​  <​br/>​
- ​AhsayOBM / AhsayACB: 8.1 or above+ ​AhsayOBM / AhsayACB: 8.1 to 8.x
  <​br/>​  <​br/>​
  OS: All platforms  OS: All platforms
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 =====  Description ​ ===== =====  Description ​ =====
 <​html>​ <​html>​
-This article outlines the steps to perform a Data Integrity Check  for backup data stored in the backup destination (e.g. local destination,​ AhsayCBS or other cloud storage).+This article outlines the steps to perform a Data Integrity Check for backup data stored in the backup destination (e.g. local destination,​ AhsayCBSor other cloud storage).
 <​br><​br>​ <​br><​br>​
-The function ​of the Data Integrity Check (DIC) is to:+The functions ​of the Data Integrity Check (DIC) is to:
 <ol> <ol>
   <​li><​font color=black> ​   <​li><​font color=black> ​
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  <​li><​font color=black> ​  <​li><​font color=black> ​
   Identify and remove partially uploaded (orphan) files from the backup destination(s) to free up storage space.</​font>​   Identify and remove partially uploaded (orphan) files from the backup destination(s) to free up storage space.</​font>​
 + </​li>​
 +
 + <​li><​font color=black> ​
 +  Identify and rebuild malfunction file index (option available for version 8.5.0.63 or above).</​font>​
  </​li>​  </​li>​
    
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  </​li>​  </​li>​
  </​ol>​  </​ol>​
 +<font color=red>​Important:​
 <br> <br>
-<font color=black><​b>​The Data Integrity Check CANNOT ​fix or repair files that are already corrupted. It will only identify and remove any corrupted files from the backup destination(s),​ so these files can be re-uploaded again on the next backup job if they still exist on the backup source. However, any corrupted files removed from the Retention Area will be not be re-uploaded and will no longer be restorable. </b></​font>​+The Data Integrity Check <​u>​cannot</​u> ​fix or repair files that are already corrupted. It will only identify and remove any corrupted files from the backup destination(s),​ so these files can be re-uploaded again on the next backup job if they still exist on the backup source. However, any corrupted files removed from the Retention Area will be not be re-uploaded and will no longer be restorable. 
 +<br> 
 +<​br>​ 
 +Also, the Rebuild index function mentioned in point 5 above is only available for AhsayOBM / ACB version 8.5.0.63 or above. 
 +<​br>​ 
 +<​br>​ 
 +      <img style="​width:​80%"​ src="​http://​wiki.ahsay.com/​lib/​exe/​fetch.php?​media=public:​8004_2.png"​/> 
 + 
 + 
 + 
 + 
 + 
 +</​font>​
 </​html>​ </​html>​
  
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   <li>   <li>
    <​font color=black>​Login to the AhsayOBM / ACB user interface, select the <​b>​Utilities</​b>​ tile.</​font><​br><​br>​    <​font color=black>​Login to the AhsayOBM / ACB user interface, select the <​b>​Utilities</​b>​ tile.</​font><​br><​br>​
-      <​img ​ alt="v7_Utilities_Tile.PNG" src="​http://​wiki.ahsay.com/​lib/​exe/​fetch.php?​media=public:​5004_0.png"/>​+      <​img ​style="width:16%" src="​http://​wiki.ahsay.com/​lib/​exe/​fetch.php?​media=public:​5004_0.png"/>​
    <​br>​    <​br>​
    <​br>​    <​br>​
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    <​br>​    <​br>​
    <​br>​    <​br>​
-      <img style="​width:​75%; border:thin solid black" src="​http://​wiki.ahsay.com/​lib/​exe/​fetch.php?​media=public:​8004_faq:​DIC-2.png"/>​+      <img style="​width:​60%" src="​http://​wiki.ahsay.com/​lib/​exe/​fetch.php?​media=public:​8004_1.png"/>​
    <​br>​    <​br>​
    <​br>  ​    <​br>  ​
    ​Note:<​br>​    ​Note:<​br>​
-   The "​All"​ backup sets option will enable check for all destinations of all backup sets. &​nbsp;​The time required to complete the integrity check will depend on the number of backup sets and destinations.</​font><br><​br><​br>​+   The "​All"​ backup sets option will enable check for all destinations of all backup sets. &​nbsp;​The time required to complete the integrity check will depend on the number of backup sets and destinations.</​font><​br><​br>​
   </li>   </li>
   <li>   <li>
    <​font color=black>​Enable the <​b>​Run Cyclic Redundancy Check (CRC) during data integrity check</​b>​ option to check on integrity of the files against the checksum file generated at the time of the backup job.    <​font color=black>​Enable the <​b>​Run Cyclic Redundancy Check (CRC) during data integrity check</​b>​ option to check on integrity of the files against the checksum file generated at the time of the backup job.
 +   <​br>​
 +   <​br>​
 +      <img style="​width:​60%"​ src="​http://​wiki.ahsay.com/​lib/​exe/​fetch.php?​media=public:​8004_4.png"/>​
 </​font><​br><​br>​ </​font><​br><​br>​
   </li>   </li>
 +  <li>
 +   <​font color=black>​Enable the <​b>​Rebuild index</​b>​ option to rebuild possible malfunction index in the backup destination.
 +   <​br>​
 +   <​br>​
 +      <img style="​width:​60%"​ src="​http://​wiki.ahsay.com/​lib/​exe/​fetch.php?​media=public:​8004_5.png"/>  ​
 +   <​br>​
 +   <​br>​
 +   <​font color=red>​Important:<​br>​
 +The Rebuild index option is only available for AhsayOBM / ACB version 8.5.0.63 or above.</​font> ​   ​
 +</​font><​br><​br>​
 +  </​li>  ​
    </​li>​    </​li>​
   <li>   <li>
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    <​br>​    <​br>​
    ​Note:<​br>​    ​Note:<​br>​
-   A data integrity check can only be performed when there is no manual / scheduled backup job in progress (of the corresponding backup set). It is highly recommended to temporarily disable the backup schedule to ensure that no scheduled backup is started while the data integrity check is still running.+   i.  ​A data integrity check can only be performed when there is no manual / scheduled backup job in progress (of the corresponding backup set). It is highly recommended to temporarily disable the backup schedule to ensure that no scheduled backup is started while the data integrity check is still running.
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    <​br/>​    <​br/>​
    <​br/>​    <​br/>​
-Also, note that the time required to complete a data check depends on a number of factors, such as the number of files / folders in the backup set(s), bandwidth available on the client computer, hardware specifications of the client computer such as the disk I/O and CPU performance,​ and if there are other resource intensive job running.+    ii.  The time required to complete a Data Integrity Check depends on a number of factors, such as the number of files/​folders in the backup set(s), ​the bandwidth available on the client computer, hardware specifications of the client computer such as the disk I/O and CPU performance,​ and if there are other resource intensive job running.
    <​br/>​    <​br/>​
    <​br/>​    <​br/>​
-   If the CRC (Cycle Redundancy Check) option is enabled, backup data will be streamed from the backup destination (e.g. the cloud storage location or FTP location for example), to the client computer ​during ​the CRC check.+   <font color=red>​iii.  ​If the CRC (Cycle Redundancy Check) option is enabled, backup data will be streamed from the backup destination (e.g. the cloud storage location or FTP location for example), to the client computer ​in order to perform ​the CRC check. ​This may incur additional charges from your Cloud Storage provider. For users with metered internet connection, this could result in additional charges by your ISP (Internet Service Provider).</​font>​
    <​br/>​    <​br/>​
    <​br/>​    <​br/>​
-   ​During a data integrity check, pay attention to the resource usage on the client computer.+   iv.  ​During a data integrity check, pay attention to the resource usage on the client computer.
  
-   For user with metered Internet connection, pay close attention to the bandwidth usage during a data integrity check if CRC is enabled. 
    <​br/>​    <​br/>​
    <​br/>​    <​br/>​
-   For backup destinations on cloud storage ​service, such as Amazon S3, data integrity checks are expected to be performed by the cloud storage service provider.+   v.  ​For backup destinations on cloud storage ​services, such as Amazon S3, data integrity checks are expected to be performed by the cloud storage service provider.
    <​br/>​    <​br/>​
    <​br/>​    <​br/>​
-   ​According to Amazon S3 FAQs ( +   ​According to Amazon S3 FAQs (<a href="​http://​aws.amazon.com/​s3/​faqs/">​http://​aws.amazon.com/​s3/​faqs/</​a>​)
-   <a class="​postlink" ​href="​http://​aws.amazon.com/​s3/​faqs/">​ +
-    ​http://​aws.amazon.com/​s3/​faqs/​ +
-   </a> +
-   )+
    <​br/>​    <​br/>​
    <​br/>​    <​br/>​
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 ===== Keywords ===== ===== Keywords =====
-single, user, rebuild, index, rebuilding, bdb, backupset, set, perform+dic, index, rebuilding, bdb, backupset, set, perform
public/8004_faq/how_to_run_a_data_integrity_check.1584675518.txt.gz · Last modified: 2020/03/20 11:38 by yuk.cheng

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