Rear disc brake vs rear drum brake maintenance (pads vs shoes)?

I just had the REAR brake pads installed at a garage for my 2010 honda civic when they told me that my pads had 2mm left. The work approach done by the "mechanic" appeared similar for the FRONT brake pads replacement done last year at 80,000km.

I also have a 2009 corolla with a REAR drum brake with a front disc brake, with also about 100,000km on it. I replaced the front pads at about 90,000km, but nothing was done to my rear drum brake.

How is a drum brake maintained periodically? Are the drum shoes the most likely item to be replaced, like disc pads?

On a vehicle, the front bakes comprise 2/3's of the braking power and the back brakes only 1/3 of the total braking power. The front brakes wear out twice as fast as the rears because of this, so this is why the rears last twice as long. The only periodical maintenance on drum brakes is to pull the drums off when you rotate the tires to blow the accumulated rust out of them every so often.

I agree with Rolomatic, but also: The rear drum brakes only do about 1/3 of the braking if you adjust them periodically when your front brakes are replaced. If you don't then the 1/3 of the braking starts reducing more and more till the fronts are doing most everything. Keep them adjusted so your brake pedal is higher off the floor.