Anonymization of argus flow data
Kaustubh Gadkari
kaustubh at cs.colostate.edu
Mon Oct 7 12:39:27 EDT 2013
Hey Carter,
I just wanted to check if you've found any reasons why ranonymize is taking so long to complete on my dataset?
Thanks,
Kaustubh
On Sep 10, 2013, at 10:40 AM, Kaustubh Gadkari <kaustubh at CS.ColoState.EDU> wrote:
>
> On Sep 10, 2013, at 9:33 AM, Carter Bullard <carter at qosient.com> wrote:
>
>> Well,
>> On my system 80% of the cycles are being spent doing the address,
>> port, mac, AS number mappings (managing allocation of a new object
>> and caching the values), and a small amount on the lookups.
>>
>> I'll work on profiling the mapping logic to see if we've got
>> something askew.
>>
>
> Great. Thanks again for the help.
>
>> Hope all is most excellent,
>>
>
> And with you too :)
>
> Kaustubh
>
>> Carter
>>
>>
>>
>> On Sep 10, 2013, at 12:22 PM, Kaustubh Gadkari <kaustubh at CS.ColoState.EDU> wrote:
>>
>>>
>>> On Sep 10, 2013, at 8:40 AM, Carter Bullard <carter at qosient.com> wrote:
>>>
>>>> Hey Kaustubh,
>>>> I've been profiling ranonymize() with a lot of data, and
>>>> while I do see opportunities to improve performance, I don't
>>>> see many massively inefficient parts of the code, when run
>>>> against my data sets. There are still some things for
>>>> me to look at, so I wanted you to know that I'm working on
>>>> your problem.
>>>>
>>>
>>> Thanks for looking at this, Carter.
>>>
>>>> Based on what you've seen me so far, you're machine is 85%
>>>> idle, is ranonymize() using 100% of a single core, or is it
>>>> sleeping a lot?
>>>>
>>>
>>> top says ranonymize is using 100% of a single core.
>>>
>>>> What kind of machine are you running on?? Can you describe the
>>>> machine a bit? CPUs, memory, disks, etc….
>>>>
>>>
>>> I've been testing this on two machines. One is a Dell PowerEdge 2970, with 2 quad core AMD Opteron processors. The machine has 32GB RAM, a 130GB system disk and 16 8TB RAID5 partitions. The other machine is a Dell PowerEdge 2950. It has 2 quad core Intel Xeon X5450 CPUs, with 32GB RAM, a 140GB system disk and 3 8TB RAID5 partitions.
>>>
>>> Thanks,
>>> Kaustubh
>>>
>>>> Carter
>>>>
>>>>
>>>> On Sep 3, 2013, at 3:05 PM, Kaustubh Gadkari <kaustubh at cs.colostate.edu> wrote:
>>>>
>>>>> On Tue, Sep 3, 2013 at 12:33 PM, Carter Bullard <carter at qosient.com> wrote:
>>>>>> Hmmmmmm, well, you're not using the machine much (85% idle)
>>>>>> so I'm looking into whether we're making any calls to any
>>>>>> routines that would add some wait states, like name lookups, or
>>>>>> sleeping somewhere.
>>>>>>
>>>>>> Lets assume that there is a big problem, and I'll try to make
>>>>>> some changes to improve your performance.
>>>>>>
>>>>>
>>>>> Thanks, Carter.
>>>>>
>>>>> Kaustubh
>>>>>
>>>>>> Carter
>>>>>>
>>>>>>
>>>>>>
>>>>>> On Sep 3, 2013, at 1:57 PM, Kaustubh Gadkari <kaustubh at cs.colostate.edu> wrote:
>>>>>>
>>>>>>> Hey Carter,
>>>>>>>
>>>>>>> On Sep 3, 2013, at 11:36 AM, Carter Bullard <carter at qosient.com> wrote:
>>>>>>>
>>>>>>>> Hey Kaustubh,
>>>>>>>> If its still writing records to the output file, its not in an infinite loop,
>>>>>>>> although I'm sure that it feels like one. So, no need to print debug msgs
>>>>>>>> or run under gdb().
>>>>>>>>
>>>>>>>> Hmmmmmm, you must have a very large number of IP addresses. racount() isn't doing
>>>>>>>> anything exotic with the "-M addr" mode. Its hashing and storing each unique
>>>>>>>> IP address, so that we can report on how many and what types.
>>>>>>>>
>>>>>>>> My guess is that you must be short on physical memory, and the programs are swapping,
>>>>>>>> which means that everything on this machine will be going very slowly.
>>>>>>>> Run " top " to see if one of our programs is eating all the memory, or
>>>>>>>> use vmstat() or vm_stat() or whatever to see if there is any paging.
>>>>>>>>
>>>>>>>
>>>>>>> No, the machine is not running out of memory. ranonymize is the largest memory user, and it is using 42.1% of a total of 32GB RAM. The swap usage is only 205MB, which is OK. vmstat shows me the following:
>>>>>>>
>>>>>>> kaustubh at proton:~$ sudo vmstat -w
>>>>>>> procs -------------------memory------------------ ---swap-- -----io---- --system-- -----cpu-------
>>>>>>> r b swpd free buff cache si so bi bo in cs us sy id wa st
>>>>>>> 1 0 205916 1638176 101636 16287400 0 0 527 342 1 1 14 0 85 1 0
>>>>>>>
>>>>>>> There are no other memory intensive processes running on the box.
>>>>>>>
>>>>>>>> If it is a memory problem, then you will need to subdivide the data based
>>>>>>>> on size, not on time, using rasplit(). And yes its easy to merge split files
>>>>>>>> back to a single file.
>>>>>>>>
>>>>>>>> UNFORTUNATELY, because the scope of anonymization is the file, anonymizing a
>>>>>>>> single big file of records will generate different results compared to
>>>>>>>> anonymizing a set of split files created from the big file. Address A will be
>>>>>>>> anonymized potentially to a different address in each file.
>>>>>>>>
>>>>>>>> The configuration provides the means to get consistent results between files,
>>>>>>>> but its a bit of work to do so.
>>>>>>>>
>>>>>>>> Do you think you're running out of memory?
>>>>>>>>
>>>>>>>
>>>>>>> No, I think I'm ok in terms of memory usage.
>>>>>>>
>>>>>>> Kaustubh
>>>>>>>
>>>>>>>> Carter
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> On Sep 3, 2013, at 1:11 PM, Kaustubh Gadkari <kaustubh.gadkari at gmail.com> wrote:
>>>>>>>>
>>>>>>>>> On Tue, Sep 3, 2013 at 8:49 AM, Carter Bullard <carter at qosient.com> wrote:
>>>>>>>>>> Hmmm, if racount() takes 18min, I would think ranonymize() should take about 20min
>>>>>>>>>> to complete. You can run " racount -M addr " to get racount() to printout address
>>>>>>>>>> information, like how many addresses are in the file.
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> Carter, I ran racount with -M addr, but the process hasn't finished
>>>>>>>>> yet (it's been running for about 90 min now). I'll let it run for a
>>>>>>>>> while longer and keep you updated.
>>>>>>>>>
>>>>>>>>>> ranonymize() works on a single argus record at a time, reading a single record,
>>>>>>>>>> anonymizing all the various data elements, and then writing the anonymized
>>>>>>>>>> record out to the output file. If ranonymize() hasn't written out a record recently,
>>>>>>>>>> then its possible that its in an infinite loop, especially if its running at 100%, and
>>>>>>>>>> its been running for a month, and it seems to have stopped writing into the file.
>>>>>>>>>> What was the last " modified " time on your output file ???
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> It hasn't stopped writing to file .. the last modified time is right
>>>>>>>>> now, since the process is still running.
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>> If you've compiled debug support into your ra* programs, you can send a USR1
>>>>>>>>>> signal to the running ranonymize() and it will start writing debug information out
>>>>>>>>>> to stderr(). Send a USR2 to turn debug output off. Assuming that ranonymize()s
>>>>>>>>>> process id is 35122, you can do this:
>>>>>>>>>>
>>>>>>>>>> % kill -USR1 35122
>>>>>>>>>> % kill -USR2 35122
>>>>>>>>>>
>>>>>>>>>> If you've compiled development support into your programs, you can attach
>>>>>>>>>> to ranonymize() using gdb(), and then step through the program to see where
>>>>>>>>>> it is.
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>> I haven't compiled my ra* programs with debug or development support.
>>>>>>>>> If you can tell me what I need to change in the Makefiles, I can do so
>>>>>>>>> and run ranonymize with gdb and see what's happening.
>>>>>>>>>
>>>>>>>>> Kaustubh
>>>>>>>>>
>>>>>>>>>> % gdb ranonymize 35122
>>>>>>>>>>
>>>>>>>>>> This will attach to the program, and stop the acitve process. If this all seems
>>>>>>>>>> unfamiliar, send more email, and I'll walk you through one of these strategies.
>>>>>>>>>>
>>>>>>>>>> Carter
>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>> On Sep 3, 2013, at 9:56 AM, Kaustubh Gadkari <kaustubh.gadkari at gmail.com> wrote:
>>>>>>>>>>
>>>>>>>>>>> On Tue, Sep 3, 2013 at 7:19 AM, Kaustubh Gadkari
>>>>>>>>>>> <kaustubh.gadkari at gmail.com> wrote:
>>>>>>>>>>>> On Tue, Sep 3, 2013 at 6:00 AM, Carter Bullard <carter at qosient.com> wrote:
>>>>>>>>>>>>> Hmmmm,
>>>>>>>>>>>>> There shouldn't be any performance issues with anonymizing a file, if your
>>>>>>>>>>>>> just
>>>>>>>>>>>>> anonymizing the IP addresses. How many addresses are in the file?
>>>>>>>>>>>>> What does your ranonymize.conf file look like? How much memory is it
>>>>>>>>>>>>> using?
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> I am not quite sure how many IP addresses there are in the file. My
>>>>>>>>>>>> ranonymize.conf looks like this:
>>>>>>>>>>>>
>>>>>>>>>>>> RANON_PRESERVE_ETHERNET_VENDOR=yes
>>>>>>>>>>>> RANON_PRESERVE_BROADCAST_ADDRESS=yes
>>>>>>>>>>>> RANON_NET_ANONYMIZATION=sequential
>>>>>>>>>>>> RANON_HOST_ANONYMIZATION=sequential
>>>>>>>>>>>> RANON_PRESERVE_NET_ADDRESS_HIERARCHY=class
>>>>>>>>>>>>
>>>>>>>>>>>> I took a look at how much memory ranonymize is using .. the usage is
>>>>>>>>>>>> about 42% on a machine with 32GB RAM.
>>>>>>>>>>>>
>>>>>>>>>>>>> ranonymize() can be a little complex O(nLogN + C), but it should be
>>>>>>>>>>>>> in the same time frame as racount(). How long does it take for racount()
>>>>>>>>>>>>> to read the file?
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> I am running racount right now .. I will post results once it finishes.
>>>>>>>>>>>
>>>>>>>>>>> racount takes about 18min to run on the file:
>>>>>>>>>>>
>>>>>>>>>>> real 17m58.528s
>>>>>>>>>>> user 17m12.413s
>>>>>>>>>>> sys 2m0.332s
>>>>>>>>>>>
>>>>>>>>>>> Kaustubh
>>>>>>>>>>>
>>>>>>>>>>>>> Just a rule of thumb. If a ra* program doesn't complete in a few minutes,
>>>>>>>>>>>>> you
>>>>>>>>>>>>> should stop it and try to figure out if there is a memory problem or not.
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> Thanks, I'll keep this in mind :)
>>>>>>>>>>>>
>>>>>>>>>>>> Thanks,
>>>>>>>>>>>> Kaustubh
>>>>>>>>>>>>
>>>>>>>>>>>>> Carter
>>>>>>>>>>>>>
>>>>>>>>>>>>> On Sep 2, 2013, at 2:20 PM, Kaustubh Gadkari <kaustubh.gadkari at gmail.com>
>>>>>>>>>>>>> wrote:
>>>>>>>>>>>>>
>>>>>>>>>>>>> Hi,
>>>>>>>>>>>>>
>>>>>>>>>>>>> I have a set of argus flow data captured at our data capture vantage point,
>>>>>>>>>>>>> and I want to anonymize the IP addresses (both source and destination) fully
>>>>>>>>>>>>> i.e. I want to replace both the addresses, using a prefix preserving
>>>>>>>>>>>>> technique. I have tried using ranonymize, but it is taking an extremely long
>>>>>>>>>>>>> time to anonymize the file (I started the process a couple of months ago, on
>>>>>>>>>>>>> a ~125GB file, and the output file size today is only ~30GB).
>>>>>>>>>>>>>
>>>>>>>>>>>>> Can anyone suggest the right way to go about anonymizing the data set I
>>>>>>>>>>>>> have? Is ranonymize the right tool for the job?
>>>>>>>>>>>>>
>>>>>>>>>>>>> Thanks,
>>>>>>>>>>>>> Kaustubh
>>>>>>>>>>>>>
>>>>>>>>>>>>> --
>>>>>>>>>>>>> Kaustubh Gadkari
>>>>>>>>>>>>>
>>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>>
>>>>>>>>>>>> --
>>>>>>>>>>>> Kaustubh Gadkari
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>>
>>>>>>>>>>> --
>>>>>>>>>>> Kaustubh Gadkari
>>>>>>>>>>>
>>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>>
>>>>>>>>> --
>>>>>>>>> Kaustubh Gadkari
>>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>> --
>>>>>>> Kaustubh Gadkari
>>>>>>> kaustubh at cs.colostate.edu
>>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Kaustubh Gadkari
>>>>>
>>>>
>>>
>>> --
>>> Kaustubh Gadkari
>>> kaustubh at cs.colostate.edu
>>>
>>
>
> --
> Kaustubh Gadkari
> kaustubh at cs.colostate.edu
>
--
Kaustubh Gadkari
kaustubh at cs.colostate.edu
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