Yes Mark I tried it like below (pg_upgrade with -k) - For 490 GB it took about 17 mins in a single node postgres . Is it possible to reduce this?
sudo -H -u postgres /usr/lib/postgresql/10/bin/pg_upgrade \
-b /usr/lib/postgresql/9.5/bin \
-B /usr/lib/postgresql/10/bin \
-d /var/lib/postgresql/data/postgresql0 \
-D /var/lib/postgresql/10/data/postgresql0 \
-o ' -c config_file=/etc/postgresql/9.5/main/postgresql.conf' \
-O ' -c config_file=/etc/postgresql/10/main/postgresql.conf' -k
On Sat, Nov 25, 2017 at 10:54 AM, Mark Kirkwood <mark.kirkwood@xxxxxxxxxxxxxxx> wrote:
I'd recommend looking at pg_upgrade again, but using the --link (-k) option to avoid copying the data. Should be quite a bit faster.
regards
Mark
On 25/11/17 18:17, Debraj Manna wrote:
Ok.
Is there any other approach by which I can do the migration without doubling the disk space?
I can bear small downtime.
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On Nov 25, 2017 10:40 AM, "Alvaro Aguayo Garcia-Rada" <aaguayo@xxxxxxxxxxxxxxx <mailto:aaguayo@xxxxxxxxxxxxxxm >> wrote:
Yes, but only during the migration. After fi ishing and checking
your data, you can stop & destroy the old instance
Of course, this is only needed if you want a zero or little
downtime migration, specially on production environment.
Regards,
Alvaro Aguayo
Jefe de Operaciones
Open Comb Systems E.I.R.L.
Oficina: (+51-1 <tel:+51-1>) 3377813 <tel:3377813> | RPM: #034252
/ (+51) 995540103 <tel:995540103> | RPC: (+51) 954183248
<tel:954183248>
Website: www.ocs.pe <http://www.ocs.pe>
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---- Debraj Manna wrote ----
I am using one node postgres.
So if I am setting up pglogical then I guess disk space will
double up?
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On Nov 25, 2017 9:34 AM, "Alvaro Aguayo Garcia-Rada"
<aaguayo@xxxxxxxxxxxxxxx <mailto:aaguayo@xxxxxxxxxxxxxxm >> wrote:
You can do an (almost) zero downtime migration between any
postgres version starting with 9.2 using pglogical.
Basically, you first set up your new instance as a full
replica of the old one. Then, you change whatever
configuration your app has, changing the connection parameters
so they point to the new instance, reboot your app(s) if
needed, and that's all. As pglogical does not blocks changes
on slaves, your app will run normally even with pglogical
installed and active, letting you a time frame where you can
have some connections still pointing to your old instance,
with changes made on such connections being reflected on your
new instance(warning: the opposite way will not happen.
Regards,
Alvaro Aguayo
Jefe de Operaciones
Open Comb Systems E.I.R.L.
Oficina: (+51-1 <tel:+51-1>) 3377813 <tel:3377813> | RPM:
#034252 / (+51) 995540103 <tel:995540103> | RPC: (+51)
954183248 <tel:954183248>
Website: www.ocs.pe <http://www.ocs.pe>
Sent from my Sony Xperia™ smartphone
---- Debraj Manna wrote ----
Cross posting from stack-exchange
<https://dba.stackexchange.com/questions/191693/faster-way-o >f-upgrading-postgres-to-10-fro m-9-5
/I am trying to test the migration of postgres to 10 from 9.5/
/
/
/On trying in a test DB of size 490 GB in one postgres node it
is taking about 18 mins. The command I used/
/
/
/sudo -H -u postgres /usr/lib/postgresql/10/bin/pg_upgrade \/
/ -b /usr/lib/postgresql/9.5/bin \/
/ -B /usr/lib/postgresql/10/bin \/
/ -d /var/lib/postgresql/data/postgresql0 \/
/ -D /var/lib/postgresql/10/data/postgresql0 \/
/ -o ' -c config_file=/etc/postgresql/9.5/main/postgresql.conf' \/
/ -O ' -c config_file=/etc/postgresql/10/main/postgresql.conf'
-k /
/
/
/Is there any faster way of doing this?/
