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SNMPv2-MIB::sysContact value.

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Option Name Default repMulticastFrequency 1 repthreshold 5 scspport sleepAfter 80 7200 (2 hours) snmpCommunity ourpwdofchoicehere snmpSysContact snmpSysLocation snmpSysName spaceErrLevel spaceWarnLevel subcluster none none none 15 30 none timeSource none volMinimumGB 64 Description optimize write performance in large clusters. NOTE: this setting is not compatible with DX Content Router versions 1.2 or earlier. Frequency with which UUIDs are multicast to verify replicas. By default this is set to 1% but can be changed to a higher approximate percentage (expressed as an integer) up to 100%. This parameter should be set to the same value for all nodes in a cluster. Replication threshold. The value of this parameter is an integer between 0 and 100, representing the allowed difference between volume percent utilizations. Lower values ensure better load balancing and higher throughput. Higher values minimize data movement at the expense of lower maximum throughput. This is the port on which client applications access cluster nodes with HTTP requests. Number of seconds of inactivity before an active node or volume becomes idle in power saving mode. Minimum supported value is 60 seconds. This parameter was deprecated with the 3.0.2 release and is now removed. Starting after 3.0.2, this parameter was superseded by administrators and operators. Before 3.0.2, the parameter controlled access to the SNMP agent for reading and writing values. SNMPv2-MIB::sysContact value. SNMPv2-MIB::sysLocation value. SNMPv2-MIB::sysName value. Percent free cluster capacity to trigger error highlight on the admin console. Percent free cluster capacity to trigger warning highlight on the admin console. Sets the LAR subcluster membership of this node. Should not contain special characters like quotes. Maximum of 16 characters. IP address of an optional NTP time server. If this is not set, the node will use its internal clock and the other cluster nodes to synchronize time. Minimum size of a device in GB before it is considered for use when using vols = all Copyright © 2010 Caringo, Inc. All rights reserved 35 Version 5.0 December 2010

Section	Page
DX Object Storage Administration Guide	1
Table of Contents	3
Chapter 1. Welcome to DX Storage	6
1.1. Overview of DX Storage	6
1.2. Components	6
1.3. About this Document	6
1.3.1. Audience	6
1.3.2. Scope	6
Chapter 2. Introduction to the Admin Console	7
2.1. Accessing the Admin Console	7
2.2. Initial View of the Admin Console	7
2.2.1. Viewing the Cluster Status Page	7
2.2.2. Viewing a Node's Status Page	8
2.3. Printing the Admin Console	8
2.4. Viewing License Information	8
Chapter 3. Managing the Cluster	10
3.1. Viewing the Cluster Status Page	10
3.2. Authenticating Cluster-Wide Actions	11
3.3. Shutting Down or Restarting the Cluster	12
3.4. Viewing Nodes in the Cluster	12
3.5. Searching for Nodes By IP Address	13
3.6. Searching for Nodes by Status	13
3.7. Choosing and Preserving Cluster Settings	13
3.7.1. Enabling Logging	15
3.7.2. Replication	15
3.7.3. Suspend	15
3.7.4. Power	15
3.7.5. Managing Tenants	15
3.8. Cluster Name	15
3.9. Cluster Multicast Address	15
3.10. % Used Indicator	15
Chapter 4. Managing Tenants	17
4.1. Terminology Related to Tenant Security	18
4.2. About the Default Cluster Domain	19
4.3. Security Privileges for Administrative Operations	20
4.4. Rules and Recommendations for Managing Tenants	21
4.5. Domain Naming Rules	21
4.6. Adding, Editing, or Deleting Tenants	22
4.7. Other Cluster Administrator Tasks	24
4.7.1. Using Administrative Override	25
4.7.1.1. Using Override to Delete an Object	25
4.7.1.2. Using Override to GET or APPEND User Lists	25
4.7.1.3. Using Override to Resolve Authorization Specification Issues	27
4.7.2. Working With Inaccessible Objects	28
Chapter 5. Managing Nodes	30
5.1. Viewing the Node Status Page	30
5.1.1. Shutting Down or Restarting a Node	30
5.1.2. Retiring or Identifying a Node	30
5.1.2.1. Retiring a Node or Volume	30
5.1.2.2. Identifying a Volume	31
5.1.3. Errors and Announcements	31
5.1.4. Additional Node Status Information	31
5.1.4.1. Hardware Status Reporting	33
5.2. Displaying Subcluster Information	34
Chapter 6. Configuring the Node	35
6.1. Option Names and Descriptions	35
6.2. Managing DX Storage Administrators and Users	41
6.2.1. Defining CAStor administrators and SNMP Administrators	41
6.2.2. Defining DX Storage Operators	42
6.2.3. Securing the Administrator and Operator Passwords	42
6.3. Managing Content Integrity Settings	43
6.3.1. autoRepOnWrite	43
6.3.2. repPriority	43
6.3.3. autoValidateRead	43
6.4. Managing Other Stream Replication Settings	44
6.4.1. minreps, maxreps, and defreps	44
6.4.2. hpStartDelay	44
6.5. Managing Volumes	44
6.5.1. device	45
6.5.2. policy	46
6.5.3. Specifying Exceptions	46
6.6. Configuring Power Management Settings	46
6.6.1. sleepAfter	46
6.6.2. wakeAfter	46
6.7. Managing Other Settings	46
6.7.1. consolePort	46
6.7.2. domainHeaders	46
6.7.3. loghost	47
6.7.4. timeSource	47
Chapter 7. Managing Volumes	49
7.1. Volume Expiration	49
7.2. Movement Between Nodes	49
7.3. Physical Errors	49
Appendix A. Implementation of Multi-Server Chassis	51
A.1. Configuration Parameters	51
A.1.1. Processes parameter	51
A.1.2. Network Setup parameters	51
A.1.3. Using the vols parameter	52
A.1.4. Using the subcluster parameter	52
A.2. Monitoring and Administration	53
Appendix B. Using SNMP with DX Storage	54
B.1. SNMP Management Information Base (MIB) Reference	54
B.2. Managing DX Storage Nodes	54
B.2.1. Shutdown Action for Nodes	54
B.2.2. Retire Action for Nodes and Volumes	54
B.2.2.1. Single Volumes	55
B.2.2.2. Entire Node	55
B.3. SNMP Tools and Monitoring Systems	55
B.3.1. Open Source Tools	55
B.3.2. SNMP Examples with DX Storage	56
B.3.3. SNMP Action OIDs	56
B.3.3.1. castorShutdownAction	56
B.3.3.2. castorRetireAction	56
B.3.3.3. castorLogLevelAction	56
B.3.3.4. castorSyslogHostAction	56
B.3.3.5. volumeRecoverySuspend	57
B.3.4. Practical SNMP with DX Storage	57
B.3.4.1. Health Monitoring	57
B.3.4.2. Capacity Monitoring	57
B.3.4.3. Client Activity Reporting	58
Appendix C. Upgrading a License or Cluster	59
C.1. Upgrading a License File	59
C.2. Software Upgrade Overview	59
C.2.1. Preparation	59
C.2.2. Upgrade Steps	60
C.2.2.1. Example Shutdown Script	60
C.2.2.2. Cluster Reboot	60
C.3. Back-out Steps	61
Appendix D. Troubleshooting	62
D.1. Restoring Domains and Buckets	62
D.1.1. Recovering a Deleted Domain	62
D.1.2. Recovering a Deleted Bucket	65
D.2. Resolving Duplicate Domain Names in a Mirrored or Disaster Recovery (DR) Cluster	66
D.2.1. Renaming a Domain in its Source Cluster (DR Cluster Conflict Only)	66
D.2.2. Renaming a Domain in a Mirrored or DR Cluster	67
D.3. Using DX Content Router to List Buckets and Objects	69
D.4. Boot Errors	69
D.5. Configuration	70
D.6. Operational Problems	70
Appendix E. Drive Identification API	72
E.1. Overview	72
E.2. Customization Steps	72
Appendix F. Customizing the Admin Console	73

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Version 5.0

December 2010

Option Name

Default

Description

optimize write performance in large clusters.

NOTE: this setting is not compatible with

DX Content Router versions 1.2 or earlier.

repMulticastFrequency

Frequency with which UUIDs are multicast

to verify replicas. By default this is set to 1%

but can be changed to a higher approximate

percentage (expressed as an integer) up to

100%. This parameter should be set to the

same value for all nodes in a cluster.

repthreshold

Replication threshold. The value of this

parameter is an integer between 0 and 100,

representing the allowed difference between

volume percent utilizations. Lower values

ensure better load balancing and higher

throughput. Higher values minimize data

movement at the expense of lower maximum

throughput.

scspport

This is the port on which client applications

access cluster nodes with HTTP requests.

sleepAfter

7200 (2 hours)

Number of seconds of inactivity before

an active node or volume becomes idle in

power saving mode. Minimum supported

value is 60 seconds.

snmpCommunity

ourpwdofchoicehere

This parameter was deprecated with the

3.0.2 release and is now removed. Starting

after 3.0.2, this parameter was superseded

administrators

and

operators

Before 3.0.2, the parameter controlled

access to the SNMP agent for reading and

writing values.

snmpSysContact

none

SNMPv2-MIB::sysContact value.

snmpSysLocation

none

SNMPv2-MIB::sysLocation value.

snmpSysName

none

SNMPv2-MIB::sysName value.

spaceErrLevel

Percent free cluster capacity to trigger error

highlight on the admin console.

spaceWarnLevel

Percent free cluster capacity to trigger

warning highlight on the admin console.

subcluster

none

Sets the LAR subcluster membership of this

node. Should not contain special characters

like quotes. Maximum of 16 characters.

timeSource

none

IP address of an optional NTP time server.

If this is not set, the node will use its

internal clock and the other cluster nodes to

synchronize time.

volMinimumGB

Minimum size of a device in GB before it is

considered for use when using

vols = all