Hi Robert and Arash, A couple of pointers and asks that might help. 1. Can you point to the code you are using for listing the buckets. 2. Which release is the cluster running on..? 3. What is the number of shards that have been configured in the bucket index for the said mentioned bucket...? 4.Have you tried timing the listing process, as to where does the slow down began, in other words after 1 million entries, 2 million entri s, or the listing is slow at per key level. 5. You could profile the timing for every 10000 entries or 100000 6.While using a additional meta, like redis in memory meta store could be a solution, but moving many moving parts altogether becomes a headache. 7. Let's look at the tunebales first, to see where the bottleneck is. 8.Another good practice , of possible in your deployment would be, if you can restrict objects per bucket, to say .5 million or 1 million, and have a client side hash/placement algorithm for writing into the buckets. 9. If these 30 million entries are static, iff , then prefetching the markers , and running are multithreaded flow makes sense. But again if these are static why would you not store them in a blob altogether, so contraindicating my own point. 10.Also do look ceph lists and mailers for ordered Vs unordered listing(remember seeing some query around it)
Thanks Romit Misra On Mon, 9 Dec 2019, 22:56 , <[email protected]> wrote: > Send ceph-users mailing list submissions to > [email protected] > > To subscribe or unsubscribe via email, send a message with subject or > body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of ceph-users digest..." > > Today's Topics: > > 1. RGW listing millions of objects takes too much time (Arash Shams) > 2. Re: RGW listing millions of objects takes too much time > (Robert LeBlanc) > 3. ceph mgr daemon multiple ip addresses (Frank R) > 4. Re: osdmaps not trimmed until ceph-mon's restarted (if cluster has a > down osd) > (Bryan Stillwell) > > > ---------------------------------------------------------------------- > > Date: Mon, 9 Dec 2019 15:46:04 +0000 > From: Arash Shams <[email protected]> > Subject: [ceph-users] RGW listing millions of objects takes too much > time > To: "[email protected]" <[email protected]> > Message-ID: <[email protected] > P265.PROD.OUTLOOK.COM> > Content-Type: multipart/alternative; boundary="_000_CWXP265MB128679 > DE9E6B2A6CA289B16492580CWXP265MB1286GBRP_" > > --_000_CWXP265MB128679DE9E6B2A6CA289B16492580CWXP265MB1286GBRP_ > Content-Type: text/plain; charset="iso-8859-1" > Content-Transfer-Encoding: quoted-printable > > Dear All, > > I have almost 30 million objects and I want to list them and index them > som= > ewhere else, > Im using boto3 with continuation Marker but it takes almost 9 hours > > can I run it in multiple threads to make it faster? what solution do you > su= > ggest to speedup this process, > > > Thanks > > > --_000_CWXP265MB128679DE9E6B2A6CA289B16492580CWXP265MB1286GBRP_ > Content-Type: text/html; charset="iso-8859-1" > Content-Transfer-Encoding: quoted-printable > > <html> > <head> > <meta http-equiv=3D"Content-Type" content=3D"text/html; > charset=3Diso-8859-= > 1"> > <style type=3D"text/css" style=3D"display:none;"> P > {margin-top:0;margin-bo= > ttom:0;} </style> > </head> > <body dir=3D"ltr"> > <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: > 12pt;= > color: rgb(0, 0, 0);"> > Dear All, </div> > <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: > 12pt;= > color: rgb(0, 0, 0);"> > <br> > </div> > <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: > 12pt;= > color: rgb(0, 0, 0);"> > I have almost 30 million objects and I want to list them and index them > som= > ewhere else, </div> > <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: > 12pt;= > color: rgb(0, 0, 0);"> > Im using boto3 with continuation Marker but it takes almost 9 hours</div> > <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: > 12pt;= > color: rgb(0, 0, 0);"> > <br> > </div> > <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: > 12pt;= > color: rgb(0, 0, 0);"> > can I run it in multiple threads to make it faster? what solution do you > su= > ggest to speedup this process, </div> > <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: > 12pt;= > color: rgb(0, 0, 0);"> > <br> > </div> > <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: > 12pt;= > color: rgb(0, 0, 0);"> > <br> > </div> > <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: > 12pt;= > color: rgb(0, 0, 0);"> > Thanks </div> > <div style=3D"font-family: Calibri, Helvetica, sans-serif; font-size: > 12pt;= > color: rgb(0, 0, 0);"> > <br> > </div> > </body> > </html> > > --_000_CWXP265MB128679DE9E6B2A6CA289B16492580CWXP265MB1286GBRP_-- > > ------------------------------ > > Date: Mon, 9 Dec 2019 08:23:55 -0800 > From: Robert LeBlanc <[email protected]> > Subject: [ceph-users] Re: RGW listing millions of objects takes too > much time > To: Arash Shams <[email protected]> > Cc: "[email protected]" <[email protected]> > Message-ID: > <CAANLjFoZu8LE0eH2vB9QArAOZJf4Ofm8V= > [email protected]> > Content-Type: multipart/alternative; > boundary="0000000000000e664e059947d3b2" > > --0000000000000e664e059947d3b2 > Content-Type: text/plain; charset="UTF-8" > > On Mon, Dec 9, 2019 at 7:47 AM Arash Shams <[email protected]> wrote: > > > Dear All, > > > > I have almost 30 million objects and I want to list them and index them > > somewhere else, > > Im using boto3 with continuation Marker but it takes almost 9 hours > > > > can I run it in multiple threads to make it faster? what solution do you > > suggest to speedup this process, > > > > > > Thanks > > > > I've thought about indexing objects elsewhere as well. One thought I had > was hooking into the HTTP flow where a PUT or DEL would update the objects > in some kind of database (async of course). We could also gather stats with > GET and POST. Initially, my thoughts were to hook into haproxy since we > already use it, but possibly RGW if that is an option. That way it would > always be up to date and not have to do big scans on the buckets (our > buckets would not perform well with this). I haven't actually gotten to the > implementation phase of this idea. > > ---------------- > Robert LeBlanc > PGP Fingerprint 79A2 9CA4 6CC4 45DD A904 C70E E654 3BB2 FA62 B9F1 > > --0000000000000e664e059947d3b2 > Content-Type: text/html; charset="UTF-8" > Content-Transfer-Encoding: quoted-printable > > <div dir=3D"ltr"><div dir=3D"ltr">On Mon, Dec 9, 2019 at 7:47 AM Arash > Sham= > s <<a href=3D"mailto:[email protected]";>[email protected]</a>> > wrot= > e:<br></div><div class=3D"gmail_quote"><blockquote class=3D"gmail_quote" > st= > yle=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid > rgb(204,204,204);padd= > ing-left:1ex"> > > > > > <div dir=3D"ltr"> > <div > style=3D"font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color= > :rgb(0,0,0)"> > Dear All,=C2=A0</div> > <div > style=3D"font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color= > :rgb(0,0,0)"> > <br> > </div> > <div > style=3D"font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color= > :rgb(0,0,0)"> > I have almost 30 million objects and I want to list them and index them > som= > ewhere else,=C2=A0</div> > <div > style=3D"font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color= > :rgb(0,0,0)"> > Im using boto3 with continuation Marker but it takes almost 9 hours</div> > <div > style=3D"font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color= > :rgb(0,0,0)"> > <br> > </div> > <div > style=3D"font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color= > :rgb(0,0,0)"> > can I run it in multiple threads to make it faster? what solution do you > su= > ggest to speedup this process,=C2=A0</div> > <div > style=3D"font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color= > :rgb(0,0,0)"> > <br> > </div> > <div > style=3D"font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color= > :rgb(0,0,0)"> > <br> > </div> > <div > style=3D"font-family:Calibri,Helvetica,sans-serif;font-size:12pt;color= > :rgb(0,0,0)"> > Thanks=C2=A0</div></div></blockquote><div > class=3D"gmail_quote"><br></div><= > div class=3D"gmail_quote">I've thought about indexing objects > elsewhere= > as well. One thought I had was hooking into the HTTP flow where a PUT or > D= > EL would update the objects in some kind of database (async of course). We > = > could also gather stats with GET and POST. Initially, my thoughts were to > h= > ook into haproxy since we already use it, but possibly RGW if that is an > op= > tion. That way it would always be up to date and not have to do big scans > o= > n the buckets (our buckets would not perform well with this). I > haven't= > actually gotten to the implementation phase of this idea.</div><br clear= > =3D"all"><div><div dir=3D"ltr" > class=3D"gmail_signature">----------------<b= > r>Robert LeBlanc<br></div></div><div>PGP Fingerprint 79A2 9CA4 6CC4 45DD > A9= > 04 =C2=A0C70E E654 3BB2 FA62 B9F1=C2=A0</div></div></div> > > --0000000000000e664e059947d3b2-- > > ------------------------------ > > Date: Mon, 9 Dec 2019 11:54:10 -0500 > From: Frank R <[email protected]> > Subject: [ceph-users] ceph mgr daemon multiple ip addresses > To: ceph-users <[email protected]> > Message-ID: > <CAMuVLDOhax+8RwPEK_52UfzmOc8dv5= > [email protected]> > Content-Type: multipart/alternative; > boundary="0000000000004ef36d0599483fd9" > > --0000000000004ef36d0599483fd9 > Content-Type: text/plain; charset="UTF-8" > > Hi all, > > Does anyone know what possible issues can arise if the ceph mgr daemon is > running on a mon node that has 2 ips in the public net range (1 is a > loopback address). > > As I understand the it. mgr will bind to all ips > > FYI - I am not sure why the loopback is there, I am trying to find out. > > thx > Frank > > > > > mlovell - ceph anycast > > --0000000000004ef36d0599483fd9 > Content-Type: text/html; charset="UTF-8" > Content-Transfer-Encoding: quoted-printable > > <div dir=3D"ltr"><div>Hi all,</div><div><br>Does anyone know what possible > = > issues can arise if the ceph mgr daemon is running on a mon node that has > 2= > ips in the public net range (1 is a loopback > address).<br><br></div><div>A= > s I understand the it. mgr will bind to all ips<br><br></div><div>FYI - I > a= > m not sure why the loopback is there, I am trying to find > out.</div><div><b= > r></div><div>thx</div><div>Frank<br><br><br><br><br>mlovell - ceph > anycast<= > br></div></div> > > --0000000000004ef36d0599483fd9-- > > ------------------------------ > > Date: Mon, 9 Dec 2019 17:24:27 +0000 > From: Bryan Stillwell <[email protected]> > Subject: [ceph-users] Re: osdmaps not trimmed until ceph-mon's > restarted (if cluster has a down osd) > To: Dan van der Ster <[email protected]> > Cc: Joao Eduardo Luis <[email protected]>, "[email protected]" <[email protected]>, > ceph-users <[email protected]> > Message-ID: <[email protected]> > Content-Type: text/plain; charset="us-ascii" > > On Nov 18, 2019, at 8:12 AM, Dan van der Ster <[email protected]> wrote: > > > > On Fri, Nov 15, 2019 at 4:45 PM Joao Eduardo Luis <[email protected]> wrote: > >> > >> On 19/11/14 11:04AM, Gregory Farnum wrote: > >>> On Thu, Nov 14, 2019 at 8:14 AM Dan van der Ster <[email protected]> > wrote: > >>>> > >>>> Hi Joao, > >>>> > >>>> I might have found the reason why several of our clusters (and maybe > >>>> Bryan's too) are getting stuck not trimming osdmaps. > >>>> It seems that when an osd fails, the min_last_epoch_clean gets stuck > >>>> forever (even long after HEALTH_OK), until the ceph-mons are > >>>> restarted. > >>>> > >>>> I've updated the ticket: https://tracker.ceph.com/issues/41154 > >>> > >>> Wrong ticket, I think you meant > https://tracker.ceph.com/issues/37875#note-7 > >> > >> I've seen this behavior a long, long time ago, but stopped being able to > >> reproduce it consistently enough to ensure the patch was working > properly. > >> > >> I think I have a patch here: > >> > >> https://github.com/ceph/ceph/pull/19076/commits > >> > >> If you are feeling adventurous, and want to give it a try, let me know. > I'll > >> be happy to forward port it to whatever you are running. > > > > Thanks Joao, this patch is what I had in mind. > > > > I'm trying to evaluate how adventurous this would be -- Is there any > > risk that if a huge number of osds are down all at once (but > > transiently), it would trigger the mon to trim too many maps? > > I would expect that the remaining up OSDs will have a safe, low, > osd_epoch ? > > > > And anyway I guess that your proposed get_min_last_epoch_clean patch > > is equivalent to what we have today if we restart the ceph-mon leader > > while an osd is down. > > Joao, > > I ran into this again today and found over 100,000 osdmaps on all 1,000 > OSDs (~50 TiB of disk space used just by osdmaps). There were down OSDs > (pretty regular occurrence with ~1,000 OSDs) so that matches up with what > Dan found. Then when I restarted all the mon nodes twice the osdmaps > started cleaning up. > > I believe the steps to reproduce would look like this: > > 1. Start with a cluster with at least 1 down osd > 2. Expand the cluster (the bigger the expansion, the more osdmaps that > pile up) > 3. Notice that after the expansion completes and the cluster is healthy > that the old osdmaps aren't cleaned up > > I would be willing to test the fix on our test cluster after 14.2.5 comes > out. Could you make a build based on that release? > > Thanks, > Bryan > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > ceph-users mailing list -- [email protected] > To unsubscribe send an email to [email protected] > %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s > > > ------------------------------ > > End of ceph-users Digest, Vol 83, Issue 35 > ****************************************** > -- *-----------------------------------------------------------------------------------------* *This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error, please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee, you should not disseminate, distribute or copy this email. 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