Hi all,
Not really a bug report because I did not manage to figure out the cause.
However, after upgrading from FC31 to FC32 I could not login any more, due
to SELinux problems. Auto-relabeling did not work, nothing really...
... until I did dnf uninstall MonetDB-selinux.
I came to this point because trying to give systemd services the correct
labels with restorecon failed with an error referencing a monetdb specific
file.
I do not have the details unfortunately, but if you get problems, beware
that MonetDB SELinux package and systemd may interfere in some way beyond
my knowledge of these services.
Best regards,
Arjen
PS: Some output from logs:
sudo ausearch -c monetdb -m AVC,SELINUX_ERR
[..]
----
time->Sat May 2 20:57:01 2020
type=AVC msg=audit(1588445821.693:203): avc: denied { open } for
pid=1232 comm="monetdbd" path="/etc/resolv.conf" dev="dm-0" ino=3409775
scontext=system_u:system_r:init_t:s0
tcontext=system_u:object_r:default_t:s0 tclass=file permissive=1
----
time->Sat May 2 21:12:56 2020
type=AVC msg=audit(1588446776.043:1194): avc: denied { execute } for
pid=2861 comm="(monetdbd)" name="monetdbd" dev="dm-0" ino=2147256
scontext=system_u:system_r:init_t:s0
tcontext=system_u:object_r:unlabeled_t:s0 tclass=file permissive=1
trawcon="unconfined_u:object_r:monetdbd_exec_t:s0"
----
time->Sat May 2 21:12:56 2020
type=AVC msg=audit(1588446776.043:1195): avc: denied { execute_no_trans }
for pid=2861 comm="(monetdbd)" path="/usr/bin/monetdbd" dev="dm-0"
ino=2147256 scontext=system_u:system_r:init_t:s0
tcontext=system_u:object_r:unlabeled_t:s0 tclass=file permissive=1
trawcon="unconfined_u:object_r:monetdbd_exec_t:s0"
----
time->Sat May 2 21:12:56 2020
type=AVC msg=audit(1588446776.044:1196): avc: denied { map } for
pid=2861 comm="monetdbd" path="/usr/bin/monetdbd" dev="dm-0" ino=2147256
scontext=system_u:system_r:init_t:s0
tcontext=system_u:object_r:unlabeled_t:s0 tclass=file permissive=1
trawcon="unconfined_u:object_r:monetdbd_exec_t:s0"
----
time->Sat May 2 21:12:56 2020
type=AVC msg=audit(1588446776.714:1197): avc: denied { remove_name } for
pid=1232 comm="monetdbd" name="merovingian.pid" dev="tmpfs" ino=34369
scontext=system_u:system_r:init_t:s0
tcontext=system_u:object_r:unlabeled_t:s0 tclass=dir permissive=1
trawcon="system_u:object_r:monetdbd_var_run_t:s0"
----
time->Sat May 2 21:12:56 2020
type=AVC msg=audit(1588446776.714:1198): avc: denied { unlink } for
pid=1232 comm="monetdbd" name="merovingian.pid" dev="tmpfs" ino=34369
scontext=system_u:system_r:init_t:s0
tcontext=system_u:object_r:unlabeled_t:s0 tclass=file permissive=1
----
time->Sat May 2 21:12:56 2020
type=AVC msg=audit(1588446776.714:1199): avc: denied { write } for
pid=1232 comm="monetdbd" name=".merovingian_lock" dev="dm-0" ino=5899443
scontext=system_u:system_r:init_t:s0
tcontext=system_u:object_r:unlabeled_t:s0 tclass=file permissive=1
trawcon="system_u:object_r:monetdbd_lock_t:s0"
----
time->Sat May 2 21:13:15 2020
type=AVC msg=audit(1588446795.214:1209): avc: denied { read } for
pid=2925 comm="(monetdbd)" name="passwd" dev="dm-0" ino=524514
scontext=system_u:system_r:init_t:s0 tcontext=system_u:object_r:var_t:s0
tclass=file permissive=1
----
time->Sat May 2 21:13:15 2020
type=AVC msg=audit(1588446795.214:1210): avc: denied { open } for
pid=2925 comm="(monetdbd)" path="/var/lib/sss/mc/passwd" dev="dm-0"
ino=524514 scontext=system_u:system_r:init_t:s0
tcontext=system_u:object_r:var_t:s0 tclass=file permissive=1
----
time->Sat May 2 21:13:15 2020
type=AVC msg=audit(1588446795.214:1211): avc: denied { map } for
pid=2925 comm="(monetdbd)" path="/var/lib/sss/mc/passwd" dev="dm-0"
ino=524514 scontext=system_u:system_r:init_t:s0
tcontext=system_u:object_r:var_t:s0 tclass=file permissive=1
----
time->Sat May 2 21:14:24 2020
type=AVC msg=audit(1588446864.487:1281): avc: denied { read } for
pid=3072 comm="(monetdbd)" name="passwd" dev="dm-0" ino=524514
scontext=system_u:system_r:init_t:s0 tcontext=system_u:object_r:var_t:s0
tclass=file permissive=1
----
time->Sat May 2 21:14:24 2020
type=AVC msg=audit(1588446864.487:1282): avc: denied { open } for
pid=3072 comm="(monetdbd)" path="/var/lib/sss/mc/passwd" dev="dm-0"
ino=524514 scontext=system_u:system_r:init_t:s0
tcontext=system_u:object_r:var_t:s0 tclass=file permissive=1
----
time->Sat May 2 21:14:24 2020
type=AVC msg=audit(1588446864.487:1283): avc: denied { map } for
pid=3072 comm="(monetdbd)" path="/var/lib/sss/mc/passwd" dev="dm-0"
ino=524514 scontext=system_u:system_r:init_t:s0
tcontext=system_u:object_r:var_t:s0 tclass=file permissive=1
--
====================================================================
ICIS, office M1.00.05 Radboud University
Mercator 1 Faculty of Science
Toernooiveld 212 arjen(a)cs.ru.nl
NL-6525 EC Nijmegen, The Netherlands +31-(0)24-365 2354
===================== http://www.informagus.nl/ ====================
--
====================================================================
ICIS, office M1.00.05 Radboud University
Mercator 1 Faculty of Science
Toernooiveld 212 arjen(a)cs.ru.nl
NL-6525 EC Nijmegen, The Netherlands +31-(0)24-365 2354
===================== http://www.informagus.nl/ ====================
Hi,
One question on python udfs. What about thread safety? In case of concurrent execution of numpy UDFs should the UDF developer use thread-safe structures or
Monetdb handles this in some way? For example, pandas is not thread safe. This means that it should not be used in a UDF?
Best,
Yannis
Hi,
I've been trying to build MoneDBe from source, using Github master. I do
not want to build the full executables, so I have used
cmake --build . --target monetdbe
With this, I am able to successfully build libmonetdbe.so. So that is
great. However there does not seem to be an install-monetdbe or similar
target. Running the `install` target tries to compile the whole
application, which is not what I want. How do I copy the compiled artifacts
(libmonetdbe.so and dependencies) to my install prefix? I'm trying not to
have to manually copy the libraries.
Regards
-
Avik
Hi there,
I'm trying to compile from the Oct2020 branch and I have a question about
the /lib64/monetdb5 folder.
This folder used to contain .mal files.
It also contained an autoload/ subfolder and a createdb/ subfolder (with
.sql files).
I don't see the same in the Oct2020 installation.
I see that the content of /sql/scripts/CMakeLists.txt is entirely commented
out.
Is the installation of all these files temporarily disabled during
development, or is this handled differently now?
Roberto
Thanks!
The point to MAL plan really helps me out!
Best,
Guodong
On Sep 21, 2020, 06:00 -0400, users-list-request(a)monetdb.org, wrote:
> Send users-list mailing list submissions to
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> or, via email, send a message with subject or body 'help' to
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>
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>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of users-list digest..."
>
>
> Today's Topics:
>
> 1. Internals of intermediate results in MonetDB (Guodong Jin)
> 2. Re: Internals of intermediate results in MonetDB (Martin Kersten)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Sun, 20 Sep 2020 23:31:50 -0400
> From: Guodong Jin <guod.jin(a)gmail.com>
> To: users-list(a)monetdb.org
> Subject: Internals of intermediate results in MonetDB
> Message-ID: <932d01d5-a742-4f57-8e19-ba7599667e42@Spark>
> Content-Type: text/plain; charset="utf-8"
>
> Hi all,
>
> Thanks for your hard works on this great open source project.
> I?m a student newly working on MonetDB to implement some research ideas, and I want to understand internals of how MonetDB chooses to materialize and how it represents intermediate results.
> As I understand, table data and intermediate results in MonetDB are all stored as BATs, but I?m not sure if there are some special optimizations on BATs, rather than just array(s) of atoms. Here are two simple examples to elaborate my questions a little bit:
>
> ?? ?1.Given two tables,?Items(id, order, price, tax), and?Orders(id, discount).
> ?? ? ? ? ?Items
> ?? ? ? ? ? ? ? ? ?[I1, I2, I3, I4, I5, I6, I7, I8, I9, I10, I11...]
> ?? ? ? ? ? ? ? ? ?[O3, O3, O3, O3, O3, O3, O3, O3, O3, O3, O4...]
> ?? ? ? ? ? ? ? ? ?[10, 11, 20, 15, 110, 80, 90, 12, 13, 88, 30...]
> ?? ? ? ? ? ? ? ? ?[0.1, 0.15, 0, 0.1, 0.1, 0.15, 0.11, 0.18, 0.10, 0.15, 0.20, ...]
> ?? ? ? ? ?Orders
> ?? ? ? ? ? ? ? ? ?[O1, O2, O3]
> ?? ? ? ? ? ? ? ? ?[0.8, 0.9, 0.95]
>
> ?? ? ? ? ?When we perform a join between these two tables on the field `order` (one-to-many relationship represented by the primary-foreign key, O3 matches with [I1, I2, ?, I10]),?in the output intermediate BATs of the join, will MonetDB duplicate `O3` 10 times? Are there any optimizations currently in MonetDB to remove/reduce the duplication?
>
> ?? ?2. Given a table?item(id, price, tax), when MonetDB performs the filter `price<10` on the table,?will MonetDB actually copy all matched tuples into intermediate BATs? Or just keep a list of OIDs of matched tuples as references?
>
> Thanks!
>
> Best,
> Guodong
>
Hi all,
Thanks for your hard works on this great open source project.
I’m a student newly working on MonetDB to implement some research ideas, and I want to understand internals of how MonetDB chooses to materialize and how it represents intermediate results.
As I understand, table data and intermediate results in MonetDB are all stored as BATs, but I’m not sure if there are some special optimizations on BATs, rather than just array(s) of atoms. Here are two simple examples to elaborate my questions a little bit:
1.Given two tables, Items(id, order, price, tax), and Orders(id, discount).
Items
[I1, I2, I3, I4, I5, I6, I7, I8, I9, I10, I11...]
[O3, O3, O3, O3, O3, O3, O3, O3, O3, O3, O4...]
[10, 11, 20, 15, 110, 80, 90, 12, 13, 88, 30...]
[0.1, 0.15, 0, 0.1, 0.1, 0.15, 0.11, 0.18, 0.10, 0.15, 0.20, ...]
Orders
[O1, O2, O3]
[0.8, 0.9, 0.95]
When we perform a join between these two tables on the field `order` (one-to-many relationship represented by the primary-foreign key, O3 matches with [I1, I2, …, I10]), in the output intermediate BATs of the join, will MonetDB duplicate `O3` 10 times? Are there any optimizations currently in MonetDB to remove/reduce the duplication?
2. Given a table item(id, price, tax), when MonetDB performs the filter `price<10` on the table, will MonetDB actually copy all matched tuples into intermediate BATs? Or just keep a list of OIDs of matched tuples as references?
Thanks!
Best,
Guodong
Hi, we encounter an error when only one table is added to a merge table definition
During a query like "select * from merge table” we get:
“Table: missing ')'"
Probably merge tables cannot contain just one table but the returned error looks like a syntax error.
Some more info to reproduce: the table that has been added to the merge table is a remote table.
Best,
Yannis
Hi,
I'm currently building and testing MonetDB on CentOS7, x86_64.
I was wondering about the recommended compiler version and compiler flags.
So far I'm using gcc 9 and specifically enabled SSE3 extensions (though I
did not notice any performance gain).
Here's my cmake command
cmake3 -DCMAKE_C_FLAGS="pthread -msse3 -O -Wall"
-DCMAKE_INSTALL_PREFIX=../install ../MonetDB
Is there a list of recommended compiler flags?
Kind regards,
Daniel
Hi,
I just realize that,
while the default (system-/admin-)username and password for a newly generated
database in MonetDB are well known in the experienced MonetDB community,
where do novice users find this information?
I cannot find any explicit (or at least implicit?) documentation of this information,
but maybe it's just that I fail to search properly?
Any help is highly appreciated!
Thanks!
Best,
Stefan
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