/// <summary>Create a new cache pool based on a CachePoolInfo object and the defaults.
/// </summary>
/// <remarks>
/// Create a new cache pool based on a CachePoolInfo object and the defaults.
/// We will fill in information that was not supplied according to the
/// defaults.
/// </remarks>
/// <exception cref="System.IO.IOException"/>
internal static CachePool CreateFromInfoAndDefaults(CachePoolInfo info)
{
UserGroupInformation ugi = null;
string ownerName = info.GetOwnerName();
if (ownerName == null)
{
ugi = NameNode.GetRemoteUser();
ownerName = ugi.GetShortUserName();
}
string groupName = info.GetGroupName();
if (groupName == null)
{
if (ugi == null)
{
ugi = NameNode.GetRemoteUser();
}
groupName = ugi.GetPrimaryGroupName();
}
FsPermission mode = (info.GetMode() == null) ? FsPermission.GetCachePoolDefault()
: info.GetMode();
long limit = info.GetLimit() == null ? CachePoolInfo.DefaultLimit : info.GetLimit
();
long maxRelativeExpiry = info.GetMaxRelativeExpiryMs() == null ? CachePoolInfo.DefaultMaxRelativeExpiry
: info.GetMaxRelativeExpiryMs();
return(new CachePool(info.GetPoolName(), ownerName, groupName, mode, limit, maxRelativeExpiry
));
}
public virtual string GetLongUsage()
{
TableListing listing = AdminHelper.GetOptionDescriptionListing();
listing.AddRow("<name>", "Name of the new pool.");
listing.AddRow("<owner>", "Username of the owner of the pool. " + "Defaults to the current user."
);
listing.AddRow("<group>", "Group of the pool. " + "Defaults to the primary group name of the current user."
);
listing.AddRow("<mode>", "UNIX-style permissions for the pool. " + "Permissions are specified in octal, e.g. 0755. "
+ "By default, this is set to " + string.Format("0%03o", FsPermission.GetCachePoolDefault
().ToShort()) + ".");
listing.AddRow("<limit>", "The maximum number of bytes that can be " + "cached by directives in this pool, in aggregate. By default, "
+ "no limit is set.");
listing.AddRow("<maxTtl>", "The maximum allowed time-to-live for " + "directives being added to the pool. This can be specified in "
+ "seconds, minutes, hours, and days, e.g. 120s, 30m, 4h, 2d. " + "Valid units are [smhd]. By default, no maximum is set. "
+ "A value of \"never\" specifies that there is no limit.");
return(GetShortUsage() + "\n" + "Add a new cache pool.\n\n" + listing.ToString());
}
