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Part II. Configuration of dCache
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The dCache Book > Configuration of dCache

Part II. Configuration of dCache

This part contains descriptions of the components of dCache, their role, functionality within the framework. In short, all information necessary for configuring them.

Table of Contents

4. Chimera
Mounting Chimera through NFS
Using dCap with a mounted file system
Communicating with Chimera
IDs
Directory Tags
Create, List and Read Directory Tags if the Namespace is not Mounted
Create, List and Read Directory Tags if the Namespace is Mounted
Directory Tags and Command Files
Directory Tags for dCache
Storage Class and Directory Tags
5. Configuration in pnfs
The Use of pnfs in dCache
Communicating with the pnfs Server
pnfsIDs
Directory Tags
Global Configuration with Wormholes
Deleted Files in pnfs
Access Control
The Databases of pnfs
6. The Cell Package
7. Resilience with the Replica Manager
Installation
Starting the Replica Manager
Operation
Startup
More on operation
Commands
Hybrid dCache
Arguments for the ReplicaManager cell in the batch file:
Monitoring Installation
Scope of this document
Prerequisites
Tomcat Installation and Configuration
8. Configuring the poolmanager
The Pool Selection Mechanism
Links
Examples
The Partition Manager
Overview
Managing Partitions
Using Partitions
Classic Partitions
Link Groups
9. The dCache Tertiary Storage System Interface
Introduction
Scope of this chapter
Requirements for a Tertiary Storage System
Migrating Tertiary Storage Systems with a file system interface.
Tertiary Storage Systems with a minimalistic PUT, GET and REMOVE interface
How dCache interacts with a Tertiary Storage System
Details on the TSS-support executable
Summary of command line options
Summary of return codes
The executable and the STORE FILE operation
The executable and the FETCH FILE operation
The executable and the REMOVE FILE operation
Configuring pools to interact with a Tertiary Storage System
The dCache layout files
What happens next
How to Store-/Restore files via the Admin Interface
How to monitor what’s going on
Log Files
Obtain information via the dCache Command Line Admin Interface
Example of an executable to simulate a tape backend
10. File Hopping
File Hopping “on arrival” from outside dCache
File mode of replicated files
File Hopping managed by the PoolManager
Example for File Hopping by the PoolManager only
File Hopping managed by the HoppingManager
11. Authorization in dCache
Basics
gPlazma1
Configuration
gPlazma2
Configuration
Using X.509 Certificates
CA Certificates
User Certificate
Host Certificate
VOMS Proxy Certificate
Configuration files
storage-authzdb
The gplazmalite-vorole-mapping plug-in
Authorizing a VO
The kpwd plug-in
The grid-mapfile plug-in
The saml-vo-mapping plug-in
The xacml-vo-mapping plug-in
gPlazma specific dCache configuration
Using Direct Calls of gPlazma1 Methods
Enabling Username/Password Access for WebDAV
gPlazma config example to work with authenticated webadmin
12. dCache as xRootd-Server
Setting up
Parameters
Quick tests
Copying files with xrdcp
Accessing files from within ROOT
xrootd security
Read-Write access
Permitting read/write access on selected directories
Token-based authorization
Strong authentication
Precedence of security mechanisms
Other configuration options
13. dCache Storage Resource Manager
Introduction
Configuring the srm service
The Basic Setup
Important srm configuration options
Utilization of Space Reservations for Data Storage
Properties of Space Reservation
dCache specific concepts
Activating SRM SpaceManager
Explicit and Implicit Space Reservations for Data Storage in dCache
SpaceManager configuration for Explicit Space Reservations
SRM SpaceManager and Link Groups
Making a Space Reservation
SRM configuration for experts
SRMWatch, SRM Monitoring Tool
Separate Node Installation
Configuring the PostgreSQL Database
SRM or srm monitoring on a separate node
Choosing The right hardware and OS for the SRM node
Hardware
Operating System
General SRM Concepts (for developers)
The SRM service
Space Management Functions
Data Transfer Functions
Request Status Functions
Directory Functions
Permission functions
14. dCache Web Monitoring
Installation
Configuration
15. dCache Webadmin-Interface
Installation
16. ACLs in dCache
Introduction
Database configuration
Configuring ACL support
Enabling ACL support
Enabling the acl service
Administrating ACLs
How to set ACLs
Viewing configured ACLs
17. GLUE info provider
Internal collection of information
Configuring the info provider
Testing the info provider
Decommissioning the old info provider
Publishing dCache information
Troubleshooting BDII problems
Updating information
18. Stage Protection
Configuration of Stage Protection
Definition of the White List
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The Admin Interface Home Chapter 4. Chimera