Listing off registered services (nova-scheduler, nova-compute and so on) and their current state. The updated_at field is used to determine if a given service is considered healthy or not.

“services” is a database table. If you don’t known what a database table is, think of it as a listing.

  • My guess was: listing somewhere other than the registered services.
    – GEdgar
    Apr 2, 2016 at 1:28

2 Answers 2


list someone or something off:

to recite a list of people or things, one by one.

  • 1
    It's still quite common that someone in the IT department will list off some selected details as a one-off paper report, so a front-office worker can trawl through the items sorting something out. Nov 24, 2011 at 17:16
  • I can attest to this being correct, too. It's commonly used in the UK.
    – Polynomial
    Nov 24, 2011 at 17:17

It means that the writer misspelled “of” as “off”.

The asker is quoting a data dictionary.* The data dictionary lists the name of each field and what it contains. The field in question (the services field) contains a

Listing *off registered services (nova-scheduler, nova-compute and so on) and their current state.

This is awkward, and as soon the extra f is removed, the awkwardness is gone. The field then contains a

Listing of registered services (nova-scheduler, nova-compute and so on) and their current state.

Others have pointed out that to list off is a verb phrase meaning to recite from a list. This is quite true. But in this context a verb phrase makes no sense. In a description of what a field contains, you expect an object (a list), not a verb (to list).

Still, I suppose it is possible the author intended that the field contains the result when you list off, what you might describe as a listing-off. But then you need the hyphen, and you still need the word of to connect it to the rest of the sentence: the field contains a

Listing-off of registered services (nova-scheduler, nova-compute and so on) and their current state.

If the OP is still in doubt of what was intended I suggest contacting the author.

* The excerpt is taken from the O’Reilly nutshell handbook Deploying OpenStack.

  • 3
    No it doesn't. I can list off numerous examples where 'off' is exactly what was meant. Nov 24, 2011 at 17:10
  • 1
    @FumbleFingers — I think it's clear from the context of the question that the phrase should be listing of. The description is not describing an action, it is describing a noun. Nov 25, 2011 at 20:30
  • It is extracted from Deploying OpenStack exactlty. BTW, What 'OP' stands for?
    – Liu
    Nov 26, 2011 at 11:53
  • OP means Original Poster -- the person who posted the question.
    – MetaEd
    Nov 26, 2011 at 15:25
  • I don't have the rest of the handbook, which might make things clearer, but from what OP has quoted, it seems equally possible the "heading" services could simply be followed by a list of actions. But it makes no difference to the meaning either way, and that's what was asked for. Nov 26, 2011 at 16:53

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.