The homogenous check- Will it be just checking for types are homogenous or if they are actually types that can be read by drill? Also, is there a good way to determine if a file can be read by drill? And will there be a perf hit if there are large number of files?
Regards Ramana On Wed, Aug 5, 2015 at 11:03 AM, Mehant Baid <baid.meh...@gmail.com> wrote: > I agree, it is definitely restrictive. We can lift the restriction for > being able to drop a table (when security is off) only if the Drill user > owns it. I think the check for homogenous files should give us enough > confidence that we are not deleting a non Drill directory. > > Thanks > Mehant > > > On 8/4/15 10:00 PM, Neeraja Rentachintala wrote: > >> Ted, thats fair point on the recovery part. >> >> Regarding the other point by Mehant (copied below) ,there is an >> implication >> that user can drop only Drill managed tables (i.e created as Drill user) >> when security is not enabled. I think this check is too restrictive (also >> unintuitive). Drill doesn't have the concept of external/managed tables >> and >> a user (impersonated user if security is enabled or Drillbit service user >> if no security is enabled) should be able to drop the table if they have >> permissions to do so. The above design proposes a check to verify if the >> files that need to be deleted are readable by Drill and I believe is a >> good >> validation to have. >> >> /The above check is in the case when security is not enabled. Meaning we >> are executing as the Drill user. If we are running as the Drill user >> (which >> might be root or a super user) its likely that this user has permissions >> to >> delete most files and checking for permissions might not suffice. So when >> security isn't enabled the proposal is to delete only those files that are >> owned (created) by the Drill user./ >> >> >> On Fri, Jul 31, 2015 at 12:09 AM, Ted Dunning <ted.dunn...@gmail.com> >> wrote: >> >> On Thu, Jul 30, 2015 at 4:56 PM, Neeraja Rentachintala < >>> nrentachint...@maprtech.com> wrote: >>> >>> Also will there any mechanism to recover once you accidentally drop? >>>> >>>> yes. Snapshots <https://www.mapr.com/resources/videos/mapr-snapshots>. >>> >>> Seriously, recovery of data due to user error is a platform thing. How >>> can >>> we recover from turning off the cluster? From removing a disk on an >>> Oracle >>> node? >>> >>> I don't think that this is Drill's business. >>> >>> >
